Home / 12,200.30-18,300.45-7,279.55

Finding the Fourth Proportional to 12,200.30, 18,300.45 and 7,279.55

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Solution

The fourth proportional to 12,200.30, 18,300.45 and 7,279.55 is: 10,919.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.30 : 18,300.45 = 7,279.55 : x
  2. Step 2: Convert to fraction form
    12,200.30/18,300.45 = 7,279.55/x
  3. Step 3: Cross multiply
    12,200.30x = 18,300.45 × 7,279.55
  4. Step 4: Simplify right side
    12,200.30x = 133,219,040.80
  5. Step 5: Solve for x
    x = 133,219,040.80/12,200.30
  6. Step 6: Final answer
    x = 10,919.33

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Similar ratio
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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.