Home / 13,691.40-20,545.20-9,984.30

Finding the Fourth Proportional to 13,691.40, 20,545.20 and 9,984.30

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Solution

The fourth proportional to 13,691.40, 20,545.20 and 9,984.30 is: 14,982.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,691.40 : 20,545.20 = 9,984.30 : x
  2. Step 2: Convert to fraction form
    13,691.40/20,545.20 = 9,984.30/x
  3. Step 3: Cross multiply
    13,691.40x = 20,545.20 × 9,984.30
  4. Step 4: Simplify right side
    13,691.40x = 205,129,440.36
  5. Step 5: Solve for x
    x = 205,129,440.36/13,691.40
  6. Step 6: Final answer
    x = 14,982.36

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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.