Home / 21,531.91-32,311.55-11,143.66

Finding the Fourth Proportional to 21,531.91, 32,311.55 and 11,143.66

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Solution

The fourth proportional to 21,531.91, 32,311.55 and 11,143.66 is: 16,722.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.91 : 32,311.55 = 11,143.66 : x
  2. Step 2: Convert to fraction form
    21,531.91/32,311.55 = 11,143.66/x
  3. Step 3: Cross multiply
    21,531.91x = 32,311.55 × 11,143.66
  4. Step 4: Simplify right side
    21,531.91x = 360,068,790.78
  5. Step 5: Solve for x
    x = 360,068,790.78/21,531.91
  6. Step 6: Final answer
    x = 16,722.57

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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.