Home / 21,402.30-32,103.45-18,129.90

Finding the Fourth Proportional to 21,402.30, 32,103.45 and 18,129.90

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Solution

The fourth proportional to 21,402.30, 32,103.45 and 18,129.90 is: 27,194.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.30 : 32,103.45 = 18,129.90 : x
  2. Step 2: Convert to fraction form
    21,402.30/32,103.45 = 18,129.90/x
  3. Step 3: Cross multiply
    21,402.30x = 32,103.45 × 18,129.90
  4. Step 4: Simplify right side
    21,402.30x = 582,032,338.16
  5. Step 5: Solve for x
    x = 582,032,338.16/21,402.30
  6. Step 6: Final answer
    x = 27,194.85

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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.