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Finding the Fourth Proportional to 8,757.20, 13,135.80 and 7,662.80

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Solution

The fourth proportional to 8,757.20, 13,135.80 and 7,662.80 is: 11,494.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.20 : 13,135.80 = 7,662.80 : x
  2. Step 2: Convert to fraction form
    8,757.20/13,135.80 = 7,662.80/x
  3. Step 3: Cross multiply
    8,757.20x = 13,135.80 × 7,662.80
  4. Step 4: Simplify right side
    8,757.20x = 100,657,008.24
  5. Step 5: Solve for x
    x = 100,657,008.24/8,757.20
  6. Step 6: Final answer
    x = 11,494.20

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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.