Home / 12,387.20-18,545.70-9,618.80

Finding the Fourth Proportional to 12,387.20, 18,545.70 and 9,618.80

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Solution

The fourth proportional to 12,387.20, 18,545.70 and 9,618.80 is: 14,400.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,387.20 : 18,545.70 = 9,618.80 : x
  2. Step 2: Convert to fraction form
    12,387.20/18,545.70 = 9,618.80/x
  3. Step 3: Cross multiply
    12,387.20x = 18,545.70 × 9,618.80
  4. Step 4: Simplify right side
    12,387.20x = 178,387,379.16
  5. Step 5: Solve for x
    x = 178,387,379.16/12,387.20
  6. Step 6: Final answer
    x = 14,400.94

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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.