Home / 10,665.60-15,979.20-9,436.80

Finding the Fourth Proportional to 10,665.60, 15,979.20 and 9,436.80

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Solution

The fourth proportional to 10,665.60, 15,979.20 and 9,436.80 is: 14,138.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,665.60 : 15,979.20 = 9,436.80 : x
  2. Step 2: Convert to fraction form
    10,665.60/15,979.20 = 9,436.80/x
  3. Step 3: Cross multiply
    10,665.60x = 15,979.20 × 9,436.80
  4. Step 4: Simplify right side
    10,665.60x = 150,792,514.56
  5. Step 5: Solve for x
    x = 150,792,514.56/10,665.60
  6. Step 6: Final answer
    x = 14,138.21

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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.