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Finding the Fourth Proportional to 27,879.92, 38,474.43 and 15,943.76

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Solution

The fourth proportional to 27,879.92, 38,474.43 and 15,943.76 is: 22,002.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,879.92 : 38,474.43 = 15,943.76 : x
  2. Step 2: Convert to fraction form
    27,879.92/38,474.43 = 15,943.76/x
  3. Step 3: Cross multiply
    27,879.92x = 38,474.43 × 15,943.76
  4. Step 4: Simplify right side
    27,879.92x = 613,427,078.06
  5. Step 5: Solve for x
    x = 613,427,078.06/27,879.92
  6. Step 6: Final answer
    x = 22,002.47

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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.