Home / 12,380.29-18,545.65-7,447.18

Finding the Fourth Proportional to 12,380.29, 18,545.65 and 7,447.18

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Solution

The fourth proportional to 12,380.29, 18,545.65 and 7,447.18 is: 11,155.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.29 : 18,545.65 = 7,447.18 : x
  2. Step 2: Convert to fraction form
    12,380.29/18,545.65 = 7,447.18/x
  3. Step 3: Cross multiply
    12,380.29x = 18,545.65 × 7,447.18
  4. Step 4: Simplify right side
    12,380.29x = 138,112,793.77
  5. Step 5: Solve for x
    x = 138,112,793.77/12,380.29
  6. Step 6: Final answer
    x = 11,155.86

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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.