Home / 12,414.20-18,635.70-7,489.40

Finding the Fourth Proportional to 12,414.20, 18,635.70 and 7,489.40

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Solution

The fourth proportional to 12,414.20, 18,635.70 and 7,489.40 is: 11,242.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,414.20 : 18,635.70 = 7,489.40 : x
  2. Step 2: Convert to fraction form
    12,414.20/18,635.70 = 7,489.40/x
  3. Step 3: Cross multiply
    12,414.20x = 18,635.70 × 7,489.40
  4. Step 4: Simplify right side
    12,414.20x = 139,570,211.58
  5. Step 5: Solve for x
    x = 139,570,211.58/12,414.20
  6. Step 6: Final answer
    x = 11,242.79

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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.