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Finding the Fourth Proportional to 8,781.30, 12,119.30 and 5,758.97

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Solution

The fourth proportional to 8,781.30, 12,119.30 and 5,758.97 is: 7,948.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.30 : 12,119.30 = 5,758.97 : x
  2. Step 2: Convert to fraction form
    8,781.30/12,119.30 = 5,758.97/x
  3. Step 3: Cross multiply
    8,781.30x = 12,119.30 × 5,758.97
  4. Step 4: Simplify right side
    8,781.30x = 69,794,649.72
  5. Step 5: Solve for x
    x = 69,794,649.72/8,781.30
  6. Step 6: Final answer
    x = 7,948.10

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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.