Home / 12,171.60-18,244.80-6,613.20

Finding the Fourth Proportional to 12,171.60, 18,244.80 and 6,613.20

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Solution

The fourth proportional to 12,171.60, 18,244.80 and 6,613.20 is: 9,912.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.60 : 18,244.80 = 6,613.20 : x
  2. Step 2: Convert to fraction form
    12,171.60/18,244.80 = 6,613.20/x
  3. Step 3: Cross multiply
    12,171.60x = 18,244.80 × 6,613.20
  4. Step 4: Simplify right side
    12,171.60x = 120,656,511.36
  5. Step 5: Solve for x
    x = 120,656,511.36/12,171.60
  6. Step 6: Final answer
    x = 9,912.95

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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.