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Finding the Fourth Proportional to 15,052.40, 20,770.52 and 8,681.10

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Solution

The fourth proportional to 15,052.40, 20,770.52 and 8,681.10 is: 11,978.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,052.40 : 20,770.52 = 8,681.10 : x
  2. Step 2: Convert to fraction form
    15,052.40/20,770.52 = 8,681.10/x
  3. Step 3: Cross multiply
    15,052.40x = 20,770.52 × 8,681.10
  4. Step 4: Simplify right side
    15,052.40x = 180,310,961.17
  5. Step 5: Solve for x
    x = 180,310,961.17/15,052.40
  6. Step 6: Final answer
    x = 11,978.88

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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.