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Finding the Fourth Proportional to 10,660.78, 15,991.17 and 3,265.21

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Solution

The fourth proportional to 10,660.78, 15,991.17 and 3,265.21 is: 4,897.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,660.78 : 15,991.17 = 3,265.21 : x
  2. Step 2: Convert to fraction form
    10,660.78/15,991.17 = 3,265.21/x
  3. Step 3: Cross multiply
    10,660.78x = 15,991.17 × 3,265.21
  4. Step 4: Simplify right side
    10,660.78x = 52,214,528.20
  5. Step 5: Solve for x
    x = 52,214,528.20/10,660.78
  6. Step 6: Final answer
    x = 4,897.82

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.