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Finding the Fourth Proportional to 15,179.68, 20,949.60 and 9,211.60

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Solution

The fourth proportional to 15,179.68, 20,949.60 and 9,211.60 is: 12,713.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,179.68 : 20,949.60 = 9,211.60 : x
  2. Step 2: Convert to fraction form
    15,179.68/20,949.60 = 9,211.60/x
  3. Step 3: Cross multiply
    15,179.68x = 20,949.60 × 9,211.60
  4. Step 4: Simplify right side
    15,179.68x = 192,979,335.36
  5. Step 5: Solve for x
    x = 192,979,335.36/15,179.68
  6. Step 6: Final answer
    x = 12,713.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.