Home / 20,980.33-31,470.57-8,500.59

Finding the Fourth Proportional to 20,980.33, 31,470.57 and 8,500.59

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Solution

The fourth proportional to 20,980.33, 31,470.57 and 8,500.59 is: 12,750.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.33 : 31,470.57 = 8,500.59 : x
  2. Step 2: Convert to fraction form
    20,980.33/31,470.57 = 8,500.59/x
  3. Step 3: Cross multiply
    20,980.33x = 31,470.57 × 8,500.59
  4. Step 4: Simplify right side
    20,980.33x = 267,518,370.13
  5. Step 5: Solve for x
    x = 267,518,370.13/20,980.33
  6. Step 6: Final answer
    x = 12,750.92

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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.