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Finding the Fourth Proportional to 27,793.80, 38,351.88 and 15,856.44

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Solution

The fourth proportional to 27,793.80, 38,351.88 and 15,856.44 is: 21,879.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,793.80 : 38,351.88 = 15,856.44 : x
  2. Step 2: Convert to fraction form
    27,793.80/38,351.88 = 15,856.44/x
  3. Step 3: Cross multiply
    27,793.80x = 38,351.88 × 15,856.44
  4. Step 4: Simplify right side
    27,793.80x = 608,124,284.11
  5. Step 5: Solve for x
    x = 608,124,284.11/27,793.80
  6. Step 6: Final answer
    x = 21,879.85

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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.