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Finding the Fourth Proportional to 10,879.74, 15,013.74 and 6,342.12

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Solution

The fourth proportional to 10,879.74, 15,013.74 and 6,342.12 is: 8,751.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,879.74 : 15,013.74 = 6,342.12 : x
  2. Step 2: Convert to fraction form
    10,879.74/15,013.74 = 6,342.12/x
  3. Step 3: Cross multiply
    10,879.74x = 15,013.74 × 6,342.12
  4. Step 4: Simplify right side
    10,879.74x = 95,218,940.73
  5. Step 5: Solve for x
    x = 95,218,940.73/10,879.74
  6. Step 6: Final answer
    x = 8,751.95

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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.