Home / 12,538.67-18,812.86-5,146.61

Finding the Fourth Proportional to 12,538.67, 18,812.86 and 5,146.61

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Solution

The fourth proportional to 12,538.67, 18,812.86 and 5,146.61 is: 7,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,538.67 : 18,812.86 = 5,146.61 : x
  2. Step 2: Convert to fraction form
    12,538.67/18,812.86 = 5,146.61/x
  3. Step 3: Cross multiply
    12,538.67x = 18,812.86 × 5,146.61
  4. Step 4: Simplify right side
    12,538.67x = 96,822,346.47
  5. Step 5: Solve for x
    x = 96,822,346.47/12,538.67
  6. Step 6: Final answer
    x = 7,721.90

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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.