Home / 20,949.40-31,387.20-11,066.92

Finding the Fourth Proportional to 20,949.40, 31,387.20 and 11,066.92

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Solution

The fourth proportional to 20,949.40, 31,387.20 and 11,066.92 is: 16,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.40 : 31,387.20 = 11,066.92 : x
  2. Step 2: Convert to fraction form
    20,949.40/31,387.20 = 11,066.92/x
  3. Step 3: Cross multiply
    20,949.40x = 31,387.20 × 11,066.92
  4. Step 4: Simplify right side
    20,949.40x = 347,359,631.42
  5. Step 5: Solve for x
    x = 347,359,631.42/20,949.40
  6. Step 6: Final answer
    x = 16,580.89

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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.