Home / 6,640.80-9,135.96-6,456.26

Finding the Fourth Proportional to 6,640.80, 9,135.96 and 6,456.26

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Solution

The fourth proportional to 6,640.80, 9,135.96 and 6,456.26 is: 8,882.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.80 : 9,135.96 = 6,456.26 : x
  2. Step 2: Convert to fraction form
    6,640.80/9,135.96 = 6,456.26/x
  3. Step 3: Cross multiply
    6,640.80x = 9,135.96 × 6,456.26
  4. Step 4: Simplify right side
    6,640.80x = 58,984,087.43
  5. Step 5: Solve for x
    x = 58,984,087.43/6,640.80
  6. Step 6: Final answer
    x = 8,882.08

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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.