Home / 20,753.26-31,137.66-12,439.24

Finding the Fourth Proportional to 20,753.26, 31,137.66 and 12,439.24

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Solution

The fourth proportional to 20,753.26, 31,137.66 and 12,439.24 is: 18,663.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.26 : 31,137.66 = 12,439.24 : x
  2. Step 2: Convert to fraction form
    20,753.26/31,137.66 = 12,439.24/x
  3. Step 3: Cross multiply
    20,753.26x = 31,137.66 × 12,439.24
  4. Step 4: Simplify right side
    20,753.26x = 387,328,825.78
  5. Step 5: Solve for x
    x = 387,328,825.78/20,753.26
  6. Step 6: Final answer
    x = 18,663.52

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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.