Home / 13,138.38-18,131.51-7,474.13

Finding the Fourth Proportional to 13,138.38, 18,131.51 and 7,474.13

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Solution

The fourth proportional to 13,138.38, 18,131.51 and 7,474.13 is: 10,314.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.38 : 18,131.51 = 7,474.13 : x
  2. Step 2: Convert to fraction form
    13,138.38/18,131.51 = 7,474.13/x
  3. Step 3: Cross multiply
    13,138.38x = 18,131.51 × 7,474.13
  4. Step 4: Simplify right side
    13,138.38x = 135,517,262.84
  5. Step 5: Solve for x
    x = 135,517,262.84/13,138.38
  6. Step 6: Final answer
    x = 10,314.61

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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.