Home / 20,979.04-31,470.18-8,493.16

Finding the Fourth Proportional to 20,979.04, 31,470.18 and 8,493.16

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Solution

The fourth proportional to 20,979.04, 31,470.18 and 8,493.16 is: 12,740.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.04 : 31,470.18 = 8,493.16 : x
  2. Step 2: Convert to fraction form
    20,979.04/31,470.18 = 8,493.16/x
  3. Step 3: Cross multiply
    20,979.04x = 31,470.18 × 8,493.16
  4. Step 4: Simplify right side
    20,979.04x = 267,281,273.97
  5. Step 5: Solve for x
    x = 267,281,273.97/20,979.04
  6. Step 6: Final answer
    x = 12,740.40

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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.