Home / 10,618.20-15,908.10-8,659.80

Finding the Fourth Proportional to 10,618.20, 15,908.10 and 8,659.80

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Solution

The fourth proportional to 10,618.20, 15,908.10 and 8,659.80 is: 12,974.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,618.20 : 15,908.10 = 8,659.80 : x
  2. Step 2: Convert to fraction form
    10,618.20/15,908.10 = 8,659.80/x
  3. Step 3: Cross multiply
    10,618.20x = 15,908.10 × 8,659.80
  4. Step 4: Simplify right side
    10,618.20x = 137,760,964.38
  5. Step 5: Solve for x
    x = 137,760,964.38/10,618.20
  6. Step 6: Final answer
    x = 12,974.04

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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.