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Finding the Fourth Proportional to 27,879.74, 38,473.14 and 15,942.86

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Solution

The fourth proportional to 27,879.74, 38,473.14 and 15,942.86 is: 22,000.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,879.74 : 38,473.14 = 15,942.86 : x
  2. Step 2: Convert to fraction form
    27,879.74/38,473.14 = 15,942.86/x
  3. Step 3: Cross multiply
    27,879.74x = 38,473.14 × 15,942.86
  4. Step 4: Simplify right side
    27,879.74x = 613,371,884.78
  5. Step 5: Solve for x
    x = 613,371,884.78/27,879.74
  6. Step 6: Final answer
    x = 22,000.63

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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.