Home / 21,622.56-29,839.20-12,191.12

Finding the Fourth Proportional to 21,622.56, 29,839.20 and 12,191.12

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Solution

The fourth proportional to 21,622.56, 29,839.20 and 12,191.12 is: 16,823.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,622.56 : 29,839.20 = 12,191.12 : x
  2. Step 2: Convert to fraction form
    21,622.56/29,839.20 = 12,191.12/x
  3. Step 3: Cross multiply
    21,622.56x = 29,839.20 × 12,191.12
  4. Step 4: Simplify right side
    21,622.56x = 363,773,267.90
  5. Step 5: Solve for x
    x = 363,773,267.90/21,622.56
  6. Step 6: Final answer
    x = 16,823.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.