Home / 13,211.30-18,231.38-7,243.53

Finding the Fourth Proportional to 13,211.30, 18,231.38 and 7,243.53

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Solution

The fourth proportional to 13,211.30, 18,231.38 and 7,243.53 is: 9,995.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.30 : 18,231.38 = 7,243.53 : x
  2. Step 2: Convert to fraction form
    13,211.30/18,231.38 = 7,243.53/x
  3. Step 3: Cross multiply
    13,211.30x = 18,231.38 × 7,243.53
  4. Step 4: Simplify right side
    13,211.30x = 132,059,470.55
  5. Step 5: Solve for x
    x = 132,059,470.55/13,211.30
  6. Step 6: Final answer
    x = 9,995.95

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Double scale
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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.