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Finding the Fourth Proportional to 10,979.20, 16,468.80 and 10,244.80

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Solution

The fourth proportional to 10,979.20, 16,468.80 and 10,244.80 is: 15,367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.20 : 16,468.80 = 10,244.80 : x
  2. Step 2: Convert to fraction form
    10,979.20/16,468.80 = 10,244.80/x
  3. Step 3: Cross multiply
    10,979.20x = 16,468.80 × 10,244.80
  4. Step 4: Simplify right side
    10,979.20x = 168,719,562.24
  5. Step 5: Solve for x
    x = 168,719,562.24/10,979.20
  6. Step 6: Final answer
    x = 15,367.20

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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.