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Finding the Fourth Proportional to 8,345.66, 11,515.99 and 6,648.49

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Solution

The fourth proportional to 8,345.66, 11,515.99 and 6,648.49 is: 9,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,345.66 : 11,515.99 = 6,648.49 : x
  2. Step 2: Convert to fraction form
    8,345.66/11,515.99 = 6,648.49/x
  3. Step 3: Cross multiply
    8,345.66x = 11,515.99 × 6,648.49
  4. Step 4: Simplify right side
    8,345.66x = 76,563,861.77
  5. Step 5: Solve for x
    x = 76,563,861.77/8,345.66
  6. Step 6: Final answer
    x = 9,174.10

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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.