Home / 21,517.20-29,687.31-13,022.46

Finding the Fourth Proportional to 21,517.20, 29,687.31 and 13,022.46

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Solution

The fourth proportional to 21,517.20, 29,687.31 and 13,022.46 is: 17,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,517.20 : 29,687.31 = 13,022.46 : x
  2. Step 2: Convert to fraction form
    21,517.20/29,687.31 = 13,022.46/x
  3. Step 3: Cross multiply
    21,517.20x = 29,687.31 × 13,022.46
  4. Step 4: Simplify right side
    21,517.20x = 386,601,806.98
  5. Step 5: Solve for x
    x = 386,601,806.98/21,517.20
  6. Step 6: Final answer
    x = 17,967.11

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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.