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Finding the Fourth Proportional to 8,499.49, 11,728.90 and 4,722.90

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Solution

The fourth proportional to 8,499.49, 11,728.90 and 4,722.90 is: 6,517.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,499.49 : 11,728.90 = 4,722.90 : x
  2. Step 2: Convert to fraction form
    8,499.49/11,728.90 = 4,722.90/x
  3. Step 3: Cross multiply
    8,499.49x = 11,728.90 × 4,722.90
  4. Step 4: Simplify right side
    8,499.49x = 55,394,421.81
  5. Step 5: Solve for x
    x = 55,394,421.81/8,499.49
  6. Step 6: Final answer
    x = 6,517.38

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Half scale
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Double scale
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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.