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Finding the Fourth Proportional to 8,778.90, 12,107 and 5,797.76

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Solution

The fourth proportional to 8,778.90, 12,107 and 5,797.76 is: 7,995.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.90 : 12,107 = 5,797.76 : x
  2. Step 2: Convert to fraction form
    8,778.90/12,107 = 5,797.76/x
  3. Step 3: Cross multiply
    8,778.90x = 12,107 × 5,797.76
  4. Step 4: Simplify right side
    8,778.90x = 70,193,480.32
  5. Step 5: Solve for x
    x = 70,193,480.32/8,778.90
  6. Step 6: Final answer
    x = 7,995.70

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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.