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Finding the Fourth Proportional to 42,486.72, 63,748 and 22,760

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Solution

The fourth proportional to 42,486.72, 63,748 and 22,760 is: 34,149.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,486.72 : 63,748 = 22,760 : x
  2. Step 2: Convert to fraction form
    42,486.72/63,748 = 22,760/x
  3. Step 3: Cross multiply
    42,486.72x = 63,748 × 22,760
  4. Step 4: Simplify right side
    42,486.72x = 1,450,904,480
  5. Step 5: Solve for x
    x = 1,450,904,480/42,486.72
  6. Step 6: Final answer
    x = 34,149.60

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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.