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Finding the Fourth Proportional to 8,757.80, 13,126.62 and 4,378.40

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Solution

The fourth proportional to 8,757.80, 13,126.62 and 4,378.40 is: 6,562.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,757.80 : 13,126.62 = 4,378.40 : x
  2. Step 2: Convert to fraction form
    8,757.80/13,126.62 = 4,378.40/x
  3. Step 3: Cross multiply
    8,757.80x = 13,126.62 × 4,378.40
  4. Step 4: Simplify right side
    8,757.80x = 57,473,593.01
  5. Step 5: Solve for x
    x = 57,473,593.01/8,757.80
  6. Step 6: Final answer
    x = 6,562.56

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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.