Home / 20,909.12-31,357.92-15,016.64

Finding the Fourth Proportional to 20,909.12, 31,357.92 and 15,016.64

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Solution

The fourth proportional to 20,909.12, 31,357.92 and 15,016.64 is: 22,520.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.12 : 31,357.92 = 15,016.64 : x
  2. Step 2: Convert to fraction form
    20,909.12/31,357.92 = 15,016.64/x
  3. Step 3: Cross multiply
    20,909.12x = 31,357.92 × 15,016.64
  4. Step 4: Simplify right side
    20,909.12x = 470,890,595.79
  5. Step 5: Solve for x
    x = 470,890,595.79/20,909.12
  6. Step 6: Final answer
    x = 22,520.82

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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.