Home / 12,198.80-18,275.16-6,988.88

Finding the Fourth Proportional to 12,198.80, 18,275.16 and 6,988.88

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Solution

The fourth proportional to 12,198.80, 18,275.16 and 6,988.88 is: 10,470.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,198.80 : 18,275.16 = 6,988.88 : x
  2. Step 2: Convert to fraction form
    12,198.80/18,275.16 = 6,988.88/x
  3. Step 3: Cross multiply
    12,198.80x = 18,275.16 × 6,988.88
  4. Step 4: Simplify right side
    12,198.80x = 127,722,900.22
  5. Step 5: Solve for x
    x = 127,722,900.22/12,198.80
  6. Step 6: Final answer
    x = 10,470.12

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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.