Home / 13,147.39-18,142.88-7,179.06

Finding the Fourth Proportional to 13,147.39, 18,142.88 and 7,179.06

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Solution

The fourth proportional to 13,147.39, 18,142.88 and 7,179.06 is: 9,906.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.39 : 18,142.88 = 7,179.06 : x
  2. Step 2: Convert to fraction form
    13,147.39/18,142.88 = 7,179.06/x
  3. Step 3: Cross multiply
    13,147.39x = 18,142.88 × 7,179.06
  4. Step 4: Simplify right side
    13,147.39x = 130,248,824.09
  5. Step 5: Solve for x
    x = 130,248,824.09/13,147.39
  6. Step 6: Final answer
    x = 9,906.82

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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.