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Finding the Fourth Proportional to 21,385.77, 32,079.06 and 20,229.09

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Solution

The fourth proportional to 21,385.77, 32,079.06 and 20,229.09 is: 30,344.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,385.77 : 32,079.06 = 20,229.09 : x
  2. Step 2: Convert to fraction form
    21,385.77/32,079.06 = 20,229.09/x
  3. Step 3: Cross multiply
    21,385.77x = 32,079.06 × 20,229.09
  4. Step 4: Simplify right side
    21,385.77x = 648,930,191.86
  5. Step 5: Solve for x
    x = 648,930,191.86/21,385.77
  6. Step 6: Final answer
    x = 30,344.02

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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.