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Finding the Fourth Proportional to 15,892, 21,930.94 and 8,721.96

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Solution

The fourth proportional to 15,892, 21,930.94 and 8,721.96 is: 12,036.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,892 : 21,930.94 = 8,721.96 : x
  2. Step 2: Convert to fraction form
    15,892/21,930.94 = 8,721.96/x
  3. Step 3: Cross multiply
    15,892x = 21,930.94 × 8,721.96
  4. Step 4: Simplify right side
    15,892x = 191,280,781.44
  5. Step 5: Solve for x
    x = 191,280,781.44/15,892
  6. Step 6: Final answer
    x = 12,036.29

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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.