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Finding the Fourth Proportional to 15,654.68, 21,603.18 and 8,581.16

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Solution

The fourth proportional to 15,654.68, 21,603.18 and 8,581.16 is: 11,841.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,654.68 : 21,603.18 = 8,581.16 : x
  2. Step 2: Convert to fraction form
    15,654.68/21,603.18 = 8,581.16/x
  3. Step 3: Cross multiply
    15,654.68x = 21,603.18 × 8,581.16
  4. Step 4: Simplify right side
    15,654.68x = 185,380,344.09
  5. Step 5: Solve for x
    x = 185,380,344.09/15,654.68
  6. Step 6: Final answer
    x = 11,841.85

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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.