Home / 20,734.20-31,101.30-18,487.80

Finding the Fourth Proportional to 20,734.20, 31,101.30 and 18,487.80

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Solution

The fourth proportional to 20,734.20, 31,101.30 and 18,487.80 is: 27,731.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,734.20 : 31,101.30 = 18,487.80 : x
  2. Step 2: Convert to fraction form
    20,734.20/31,101.30 = 18,487.80/x
  3. Step 3: Cross multiply
    20,734.20x = 31,101.30 × 18,487.80
  4. Step 4: Simplify right side
    20,734.20x = 574,994,614.14
  5. Step 5: Solve for x
    x = 574,994,614.14/20,734.20
  6. Step 6: Final answer
    x = 27,731.70

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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.