Home / 13,146.75-18,144.21-8,679.81

Finding the Fourth Proportional to 13,146.75, 18,144.21 and 8,679.81

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Solution

The fourth proportional to 13,146.75, 18,144.21 and 8,679.81 is: 11,979.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.75 : 18,144.21 = 8,679.81 : x
  2. Step 2: Convert to fraction form
    13,146.75/18,144.21 = 8,679.81/x
  3. Step 3: Cross multiply
    13,146.75x = 18,144.21 × 8,679.81
  4. Step 4: Simplify right side
    13,146.75x = 157,488,295.40
  5. Step 5: Solve for x
    x = 157,488,295.40/13,146.75
  6. Step 6: Final answer
    x = 11,979.26

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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.