Home / 7,209.92-9,920.80-5,530.66

Finding the Fourth Proportional to 7,209.92, 9,920.80 and 5,530.66

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Solution

The fourth proportional to 7,209.92, 9,920.80 and 5,530.66 is: 7,610.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.92 : 9,920.80 = 5,530.66 : x
  2. Step 2: Convert to fraction form
    7,209.92/9,920.80 = 5,530.66/x
  3. Step 3: Cross multiply
    7,209.92x = 9,920.80 × 5,530.66
  4. Step 4: Simplify right side
    7,209.92x = 54,868,571.73
  5. Step 5: Solve for x
    x = 54,868,571.73/7,209.92
  6. Step 6: Final answer
    x = 7,610.15

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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.