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Finding the Fourth Proportional to 8,757.20, 13,135.80 and 4,077.20

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Solution

The fourth proportional to 8,757.20, 13,135.80 and 4,077.20 is: 6,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.20 : 13,135.80 = 4,077.20 : x
  2. Step 2: Convert to fraction form
    8,757.20/13,135.80 = 4,077.20/x
  3. Step 3: Cross multiply
    8,757.20x = 13,135.80 × 4,077.20
  4. Step 4: Simplify right side
    8,757.20x = 53,557,283.76
  5. Step 5: Solve for x
    x = 53,557,283.76/8,757.20
  6. Step 6: Final answer
    x = 6,115.80

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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.