Home / 13,147.76-18,143.66-7,179.48

Finding the Fourth Proportional to 13,147.76, 18,143.66 and 7,179.48

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Solution

The fourth proportional to 13,147.76, 18,143.66 and 7,179.48 is: 9,907.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.76 : 18,143.66 = 7,179.48 : x
  2. Step 2: Convert to fraction form
    13,147.76/18,143.66 = 7,179.48/x
  3. Step 3: Cross multiply
    13,147.76x = 18,143.66 × 7,179.48
  4. Step 4: Simplify right side
    13,147.76x = 130,262,062.05
  5. Step 5: Solve for x
    x = 130,262,062.05/13,147.76
  6. Step 6: Final answer
    x = 9,907.55

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Similar ratio
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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.