Home / 21,517.38-32,218.02-12,143.39

Finding the Fourth Proportional to 21,517.38, 32,218.02 and 12,143.39

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Solution

The fourth proportional to 21,517.38, 32,218.02 and 12,143.39 is: 18,182.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,517.38 : 32,218.02 = 12,143.39 : x
  2. Step 2: Convert to fraction form
    21,517.38/32,218.02 = 12,143.39/x
  3. Step 3: Cross multiply
    21,517.38x = 32,218.02 × 12,143.39
  4. Step 4: Simplify right side
    21,517.38x = 391,235,820.80
  5. Step 5: Solve for x
    x = 391,235,820.80/21,517.38
  6. Step 6: Final answer
    x = 18,182.32

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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.