Home / 7,129.25-9,838.19-4,146.12

Finding the Fourth Proportional to 7,129.25, 9,838.19 and 4,146.12

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Solution

The fourth proportional to 7,129.25, 9,838.19 and 4,146.12 is: 5,721.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.25 : 9,838.19 = 4,146.12 : x
  2. Step 2: Convert to fraction form
    7,129.25/9,838.19 = 4,146.12/x
  3. Step 3: Cross multiply
    7,129.25x = 9,838.19 × 4,146.12
  4. Step 4: Simplify right side
    7,129.25x = 40,790,326.69
  5. Step 5: Solve for x
    x = 40,790,326.69/7,129.25
  6. Step 6: Final answer
    x = 5,721.55

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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.