Home / 13,147.91-18,143.19-7,179.47

Finding the Fourth Proportional to 13,147.91, 18,143.19 and 7,179.47

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Solution

The fourth proportional to 13,147.91, 18,143.19 and 7,179.47 is: 9,907.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.91 : 18,143.19 = 7,179.47 : x
  2. Step 2: Convert to fraction form
    13,147.91/18,143.19 = 7,179.47/x
  3. Step 3: Cross multiply
    13,147.91x = 18,143.19 × 7,179.47
  4. Step 4: Simplify right side
    13,147.91x = 130,258,397.59
  5. Step 5: Solve for x
    x = 130,258,397.59/13,147.91
  6. Step 6: Final answer
    x = 9,907.16

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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.