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Finding the Fourth Proportional to 15,862.59, 21,889.17 and 8,788.86

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Solution

The fourth proportional to 15,862.59, 21,889.17 and 8,788.86 is: 12,127.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,862.59 : 21,889.17 = 8,788.86 : x
  2. Step 2: Convert to fraction form
    15,862.59/21,889.17 = 8,788.86/x
  3. Step 3: Cross multiply
    15,862.59x = 21,889.17 × 8,788.86
  4. Step 4: Simplify right side
    15,862.59x = 192,380,850.65
  5. Step 5: Solve for x
    x = 192,380,850.65/15,862.59
  6. Step 6: Final answer
    x = 12,127.96

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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.