Home / 13,959.28-20,982.84-12,909.52

Finding the Fourth Proportional to 13,959.28, 20,982.84 and 12,909.52

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Solution

The fourth proportional to 13,959.28, 20,982.84 and 12,909.52 is: 19,404.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,959.28 : 20,982.84 = 12,909.52 : x
  2. Step 2: Convert to fraction form
    13,959.28/20,982.84 = 12,909.52/x
  3. Step 3: Cross multiply
    13,959.28x = 20,982.84 × 12,909.52
  4. Step 4: Simplify right side
    13,959.28x = 270,878,392.64
  5. Step 5: Solve for x
    x = 270,878,392.64/13,959.28
  6. Step 6: Final answer
    x = 19,404.90

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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.