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Finding the Fourth Proportional to 8,618.92, 11,897.13 and 5,081.91

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Solution

The fourth proportional to 8,618.92, 11,897.13 and 5,081.91 is: 7,014.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.92 : 11,897.13 = 5,081.91 : x
  2. Step 2: Convert to fraction form
    8,618.92/11,897.13 = 5,081.91/x
  3. Step 3: Cross multiply
    8,618.92x = 11,897.13 × 5,081.91
  4. Step 4: Simplify right side
    8,618.92x = 60,460,089.78
  5. Step 5: Solve for x
    x = 60,460,089.78/8,618.92
  6. Step 6: Final answer
    x = 7,014.81

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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.