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Finding the Fourth Proportional to 27,891.78, 38,489.50 and 15,144.46

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Solution

The fourth proportional to 27,891.78, 38,489.50 and 15,144.46 is: 20,898.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,891.78 : 38,489.50 = 15,144.46 : x
  2. Step 2: Convert to fraction form
    27,891.78/38,489.50 = 15,144.46/x
  3. Step 3: Cross multiply
    27,891.78x = 38,489.50 × 15,144.46
  4. Step 4: Simplify right side
    27,891.78x = 582,902,693.17
  5. Step 5: Solve for x
    x = 582,902,693.17/27,891.78
  6. Step 6: Final answer
    x = 20,898.73

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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.