Home / 20,990.04-31,470.48-9,296.88

Finding the Fourth Proportional to 20,990.04, 31,470.48 and 9,296.88

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Solution

The fourth proportional to 20,990.04, 31,470.48 and 9,296.88 is: 13,938.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.04 : 31,470.48 = 9,296.88 : x
  2. Step 2: Convert to fraction form
    20,990.04/31,470.48 = 9,296.88/x
  3. Step 3: Cross multiply
    20,990.04x = 31,470.48 × 9,296.88
  4. Step 4: Simplify right side
    20,990.04x = 292,577,276.10
  5. Step 5: Solve for x
    x = 292,577,276.10/20,990.04
  6. Step 6: Final answer
    x = 13,938.86

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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.