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Finding the Fourth Proportional to 42,380.70, 63,591.70 and 17,428.26

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Solution

The fourth proportional to 42,380.70, 63,591.70 and 17,428.26 is: 26,150.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,380.70 : 63,591.70 = 17,428.26 : x
  2. Step 2: Convert to fraction form
    42,380.70/63,591.70 = 17,428.26/x
  3. Step 3: Cross multiply
    42,380.70x = 63,591.70 × 17,428.26
  4. Step 4: Simplify right side
    42,380.70x = 1,108,292,681.44
  5. Step 5: Solve for x
    x = 1,108,292,681.44/42,380.70
  6. Step 6: Final answer
    x = 26,150.88

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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.