Home / 13,147.72-18,143.60-7,179.24

Finding the Fourth Proportional to 13,147.72, 18,143.60 and 7,179.24

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Solution

The fourth proportional to 13,147.72, 18,143.60 and 7,179.24 is: 9,907.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.72 : 18,143.60 = 7,179.24 : x
  2. Step 2: Convert to fraction form
    13,147.72/18,143.60 = 7,179.24/x
  3. Step 3: Cross multiply
    13,147.72x = 18,143.60 × 7,179.24
  4. Step 4: Simplify right side
    13,147.72x = 130,257,258.86
  5. Step 5: Solve for x
    x = 130,257,258.86/13,147.72
  6. Step 6: Final answer
    x = 9,907.21

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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.