Home / 20,767.12-31,149.17-8,114.50

Finding the Fourth Proportional to 20,767.12, 31,149.17 and 8,114.50

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Solution

The fourth proportional to 20,767.12, 31,149.17 and 8,114.50 is: 12,171.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,767.12 : 31,149.17 = 8,114.50 : x
  2. Step 2: Convert to fraction form
    20,767.12/31,149.17 = 8,114.50/x
  3. Step 3: Cross multiply
    20,767.12x = 31,149.17 × 8,114.50
  4. Step 4: Simplify right side
    20,767.12x = 252,759,823.16
  5. Step 5: Solve for x
    x = 252,759,823.16/20,767.12
  6. Step 6: Final answer
    x = 12,171.16

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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.