Home / 20,982.08-31,458.40-9,288.96

Finding the Fourth Proportional to 20,982.08, 31,458.40 and 9,288.96

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Solution

The fourth proportional to 20,982.08, 31,458.40 and 9,288.96 is: 13,926.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.08 : 31,458.40 = 9,288.96 : x
  2. Step 2: Convert to fraction form
    20,982.08/31,458.40 = 9,288.96/x
  3. Step 3: Cross multiply
    20,982.08x = 31,458.40 × 9,288.96
  4. Step 4: Simplify right side
    20,982.08x = 292,215,819.26
  5. Step 5: Solve for x
    x = 292,215,819.26/20,982.08
  6. Step 6: Final answer
    x = 13,926.92

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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.