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Finding the Fourth Proportional to 8,679.66, 11,983.88 and 5,540.10

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Solution

The fourth proportional to 8,679.66, 11,983.88 and 5,540.10 is: 7,649.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.66 : 11,983.88 = 5,540.10 : x
  2. Step 2: Convert to fraction form
    8,679.66/11,983.88 = 5,540.10/x
  3. Step 3: Cross multiply
    8,679.66x = 11,983.88 × 5,540.10
  4. Step 4: Simplify right side
    8,679.66x = 66,391,865.89
  5. Step 5: Solve for x
    x = 66,391,865.89/8,679.66
  6. Step 6: Final answer
    x = 7,649.13

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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.