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Finding the Fourth Proportional to 15,934.92, 21,987.63 and 8,861.19

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Solution

The fourth proportional to 15,934.92, 21,987.63 and 8,861.19 is: 12,227.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,934.92 : 21,987.63 = 8,861.19 : x
  2. Step 2: Convert to fraction form
    15,934.92/21,987.63 = 8,861.19/x
  3. Step 3: Cross multiply
    15,934.92x = 21,987.63 × 8,861.19
  4. Step 4: Simplify right side
    15,934.92x = 194,836,567.08
  5. Step 5: Solve for x
    x = 194,836,567.08/15,934.92
  6. Step 6: Final answer
    x = 12,227.02

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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.