Home / 20,980.52-31,470.64-8,500.36

Finding the Fourth Proportional to 20,980.52, 31,470.64 and 8,500.36

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Solution

The fourth proportional to 20,980.52, 31,470.64 and 8,500.36 is: 12,750.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.52 : 31,470.64 = 8,500.36 : x
  2. Step 2: Convert to fraction form
    20,980.52/31,470.64 = 8,500.36/x
  3. Step 3: Cross multiply
    20,980.52x = 31,470.64 × 8,500.36
  4. Step 4: Simplify right side
    20,980.52x = 267,511,769.43
  5. Step 5: Solve for x
    x = 267,511,769.43/20,980.52
  6. Step 6: Final answer
    x = 12,750.48

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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.