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Finding the Fourth Proportional to 15,327, 21,151.28 and 8,703

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Solution

The fourth proportional to 15,327, 21,151.28 and 8,703 is: 12,010.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,327 : 21,151.28 = 8,703 : x
  2. Step 2: Convert to fraction form
    15,327/21,151.28 = 8,703/x
  3. Step 3: Cross multiply
    15,327x = 21,151.28 × 8,703
  4. Step 4: Simplify right side
    15,327x = 184,079,589.84
  5. Step 5: Solve for x
    x = 184,079,589.84/15,327
  6. Step 6: Final answer
    x = 12,010.15

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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.