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Finding the Fourth Proportional to 28,424.16, 42,645 and 11,792

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Solution

The fourth proportional to 28,424.16, 42,645 and 11,792 is: 17,691.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,424.16 : 42,645 = 11,792 : x
  2. Step 2: Convert to fraction form
    28,424.16/42,645 = 11,792/x
  3. Step 3: Cross multiply
    28,424.16x = 42,645 × 11,792
  4. Step 4: Simplify right side
    28,424.16x = 502,869,840
  5. Step 5: Solve for x
    x = 502,869,840/28,424.16
  6. Step 6: Final answer
    x = 17,691.63

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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.