Home / 20,882.60-31,356.30-12,134.60

Finding the Fourth Proportional to 20,882.60, 31,356.30 and 12,134.60

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Solution

The fourth proportional to 20,882.60, 31,356.30 and 12,134.60 is: 18,220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,882.60 : 31,356.30 = 12,134.60 : x
  2. Step 2: Convert to fraction form
    20,882.60/31,356.30 = 12,134.60/x
  3. Step 3: Cross multiply
    20,882.60x = 31,356.30 × 12,134.60
  4. Step 4: Simplify right side
    20,882.60x = 380,496,157.98
  5. Step 5: Solve for x
    x = 380,496,157.98/20,882.60
  6. Step 6: Final answer
    x = 18,220.73

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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.