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Finding the Fourth Proportional to 21,909.38, 32,864.04 and 8,764.83

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Solution

The fourth proportional to 21,909.38, 32,864.04 and 8,764.83 is: 13,147.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.38 : 32,864.04 = 8,764.83 : x
  2. Step 2: Convert to fraction form
    21,909.38/32,864.04 = 8,764.83/x
  3. Step 3: Cross multiply
    21,909.38x = 32,864.04 × 8,764.83
  4. Step 4: Simplify right side
    21,909.38x = 288,047,723.71
  5. Step 5: Solve for x
    x = 288,047,723.71/21,909.38
  6. Step 6: Final answer
    x = 13,147.24

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1.5x scale

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.