Home / 21,424.52-32,143.80-13,517.90

Finding the Fourth Proportional to 21,424.52, 32,143.80 and 13,517.90

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Solution

The fourth proportional to 21,424.52, 32,143.80 and 13,517.90 is: 20,281.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,424.52 : 32,143.80 = 13,517.90 : x
  2. Step 2: Convert to fraction form
    21,424.52/32,143.80 = 13,517.90/x
  3. Step 3: Cross multiply
    21,424.52x = 32,143.80 × 13,517.90
  4. Step 4: Simplify right side
    21,424.52x = 434,516,674.02
  5. Step 5: Solve for x
    x = 434,516,674.02/21,424.52
  6. Step 6: Final answer
    x = 20,281.28

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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.