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Finding the Fourth Proportional to 21,700.20, 32,543.90 and 8,548.20

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Solution

The fourth proportional to 21,700.20, 32,543.90 and 8,548.20 is: 12,819.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,700.20 : 32,543.90 = 8,548.20 : x
  2. Step 2: Convert to fraction form
    21,700.20/32,543.90 = 8,548.20/x
  3. Step 3: Cross multiply
    21,700.20x = 32,543.90 × 8,548.20
  4. Step 4: Simplify right side
    21,700.20x = 278,191,765.98
  5. Step 5: Solve for x
    x = 278,191,765.98/21,700.20
  6. Step 6: Final answer
    x = 12,819.78

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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.