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Finding the Fourth Proportional to 6,759.20, 9,358.80 and 6,240.80

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Solution

The fourth proportional to 6,759.20, 9,358.80 and 6,240.80 is: 8,641.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,759.20 : 9,358.80 = 6,240.80 : x
  2. Step 2: Convert to fraction form
    6,759.20/9,358.80 = 6,240.80/x
  3. Step 3: Cross multiply
    6,759.20x = 9,358.80 × 6,240.80
  4. Step 4: Simplify right side
    6,759.20x = 58,406,399.04
  5. Step 5: Solve for x
    x = 58,406,399.04/6,759.20
  6. Step 6: Final answer
    x = 8,641.02

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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.