Home / 20,868.39-31,323.08-15,305.90

Finding the Fourth Proportional to 20,868.39, 31,323.08 and 15,305.90

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Solution

The fourth proportional to 20,868.39, 31,323.08 and 15,305.90 is: 22,973.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.39 : 31,323.08 = 15,305.90 : x
  2. Step 2: Convert to fraction form
    20,868.39/31,323.08 = 15,305.90/x
  3. Step 3: Cross multiply
    20,868.39x = 31,323.08 × 15,305.90
  4. Step 4: Simplify right side
    20,868.39x = 479,427,811.82
  5. Step 5: Solve for x
    x = 479,427,811.82/20,868.39
  6. Step 6: Final answer
    x = 22,973.88

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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.