Home / 20,965.96-31,380.78-15,417.88

Finding the Fourth Proportional to 20,965.96, 31,380.78 and 15,417.88

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Solution

The fourth proportional to 20,965.96, 31,380.78 and 15,417.88 is: 23,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.96 : 31,380.78 = 15,417.88 : x
  2. Step 2: Convert to fraction form
    20,965.96/31,380.78 = 15,417.88/x
  3. Step 3: Cross multiply
    20,965.96x = 31,380.78 × 15,417.88
  4. Step 4: Simplify right side
    20,965.96x = 483,825,100.35
  5. Step 5: Solve for x
    x = 483,825,100.35/20,965.96
  6. Step 6: Final answer
    x = 23,076.70

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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.