Home / 13,545.20-20,269.74-8,278.40

Finding the Fourth Proportional to 13,545.20, 20,269.74 and 8,278.40

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Solution

The fourth proportional to 13,545.20, 20,269.74 and 8,278.40 is: 12,388.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.20 : 20,269.74 = 8,278.40 : x
  2. Step 2: Convert to fraction form
    13,545.20/20,269.74 = 8,278.40/x
  3. Step 3: Cross multiply
    13,545.20x = 20,269.74 × 8,278.40
  4. Step 4: Simplify right side
    13,545.20x = 167,801,015.62
  5. Step 5: Solve for x
    x = 167,801,015.62/13,545.20
  6. Step 6: Final answer
    x = 12,388.23

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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.