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Finding the Fourth Proportional to 6,679.20, 10,040.40 and 6,160.80

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Solution

The fourth proportional to 6,679.20, 10,040.40 and 6,160.80 is: 9,261.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,679.20 : 10,040.40 = 6,160.80 : x
  2. Step 2: Convert to fraction form
    6,679.20/10,040.40 = 6,160.80/x
  3. Step 3: Cross multiply
    6,679.20x = 10,040.40 × 6,160.80
  4. Step 4: Simplify right side
    6,679.20x = 61,856,896.32
  5. Step 5: Solve for x
    x = 61,856,896.32/6,679.20
  6. Step 6: Final answer
    x = 9,261.12

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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.