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Finding the Fourth Proportional to 8,758.80, 13,138.20 and 2,518.80

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Solution

The fourth proportional to 8,758.80, 13,138.20 and 2,518.80 is: 3,778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,758.80 : 13,138.20 = 2,518.80 : x
  2. Step 2: Convert to fraction form
    8,758.80/13,138.20 = 2,518.80/x
  3. Step 3: Cross multiply
    8,758.80x = 13,138.20 × 2,518.80
  4. Step 4: Simplify right side
    8,758.80x = 33,092,498.16
  5. Step 5: Solve for x
    x = 33,092,498.16/8,758.80
  6. Step 6: Final answer
    x = 3,778.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.