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Finding the Fourth Proportional to 15,909.46, 21,956.08 and 8,835.92

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Solution

The fourth proportional to 15,909.46, 21,956.08 and 8,835.92 is: 12,194.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.46 : 21,956.08 = 8,835.92 : x
  2. Step 2: Convert to fraction form
    15,909.46/21,956.08 = 8,835.92/x
  3. Step 3: Cross multiply
    15,909.46x = 21,956.08 × 8,835.92
  4. Step 4: Simplify right side
    15,909.46x = 194,002,166.39
  5. Step 5: Solve for x
    x = 194,002,166.39/15,909.46
  6. Step 6: Final answer
    x = 12,194.14

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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.