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Finding the Fourth Proportional to 8,416.76, 11,615.16 and 4,690.76

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Solution

The fourth proportional to 8,416.76, 11,615.16 and 4,690.76 is: 6,473.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,416.76 : 11,615.16 = 4,690.76 : x
  2. Step 2: Convert to fraction form
    8,416.76/11,615.16 = 4,690.76/x
  3. Step 3: Cross multiply
    8,416.76x = 11,615.16 × 4,690.76
  4. Step 4: Simplify right side
    8,416.76x = 54,483,927.92
  5. Step 5: Solve for x
    x = 54,483,927.92/8,416.76
  6. Step 6: Final answer
    x = 6,473.27

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Find fourth proportional to 4,208.38, 5,807.58 and 2,345.38
Half scale
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Double scale
Find fourth proportional to 8,417.76, 11,616.54 and 4,691.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.