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Finding the Fourth Proportional to 15,806.52, 21,811.92 and 8,732.88

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Solution

The fourth proportional to 15,806.52, 21,811.92 and 8,732.88 is: 12,050.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,806.52 : 21,811.92 = 8,732.88 : x
  2. Step 2: Convert to fraction form
    15,806.52/21,811.92 = 8,732.88/x
  3. Step 3: Cross multiply
    15,806.52x = 21,811.92 × 8,732.88
  4. Step 4: Simplify right side
    15,806.52x = 190,480,879.93
  5. Step 5: Solve for x
    x = 190,480,879.93/15,806.52
  6. Step 6: Final answer
    x = 12,050.78

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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.