Home / 20,759.28-31,121.64-14,169.12

Finding the Fourth Proportional to 20,759.28, 31,121.64 and 14,169.12

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Solution

The fourth proportional to 20,759.28, 31,121.64 and 14,169.12 is: 21,241.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.28 : 31,121.64 = 14,169.12 : x
  2. Step 2: Convert to fraction form
    20,759.28/31,121.64 = 14,169.12/x
  3. Step 3: Cross multiply
    20,759.28x = 31,121.64 × 14,169.12
  4. Step 4: Simplify right side
    20,759.28x = 440,966,251.76
  5. Step 5: Solve for x
    x = 440,966,251.76/20,759.28
  6. Step 6: Final answer
    x = 21,241.89

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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.