Home / 21,520.35-32,262.30-8,381.88

Finding the Fourth Proportional to 21,520.35, 32,262.30 and 8,381.88

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Solution

The fourth proportional to 21,520.35, 32,262.30 and 8,381.88 is: 12,565.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.35 : 32,262.30 = 8,381.88 : x
  2. Step 2: Convert to fraction form
    21,520.35/32,262.30 = 8,381.88/x
  3. Step 3: Cross multiply
    21,520.35x = 32,262.30 × 8,381.88
  4. Step 4: Simplify right side
    21,520.35x = 270,418,727.12
  5. Step 5: Solve for x
    x = 270,418,727.12/21,520.35
  6. Step 6: Final answer
    x = 12,565.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.