Home / 20,767.20-31,150.80-18,520.80

Finding the Fourth Proportional to 20,767.20, 31,150.80 and 18,520.80

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Solution

The fourth proportional to 20,767.20, 31,150.80 and 18,520.80 is: 27,781.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.20 : 31,150.80 = 18,520.80 : x
  2. Step 2: Convert to fraction form
    20,767.20/31,150.80 = 18,520.80/x
  3. Step 3: Cross multiply
    20,767.20x = 31,150.80 × 18,520.80
  4. Step 4: Simplify right side
    20,767.20x = 576,937,736.64
  5. Step 5: Solve for x
    x = 576,937,736.64/20,767.20
  6. Step 6: Final answer
    x = 27,781.20

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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.