Home / 13,182.12-18,191.78-7,517.72

Finding the Fourth Proportional to 13,182.12, 18,191.78 and 7,517.72

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Solution

The fourth proportional to 13,182.12, 18,191.78 and 7,517.72 is: 10,374.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,182.12 : 18,191.78 = 7,517.72 : x
  2. Step 2: Convert to fraction form
    13,182.12/18,191.78 = 7,517.72/x
  3. Step 3: Cross multiply
    13,182.12x = 18,191.78 × 7,517.72
  4. Step 4: Simplify right side
    13,182.12x = 136,760,708.34
  5. Step 5: Solve for x
    x = 136,760,708.34/13,182.12
  6. Step 6: Final answer
    x = 10,374.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.