Home / 13,122.38-18,112.12-10,133.66

Finding the Fourth Proportional to 13,122.38, 18,112.12 and 10,133.66

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Solution

The fourth proportional to 13,122.38, 18,112.12 and 10,133.66 is: 13,986.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,122.38 : 18,112.12 = 10,133.66 : x
  2. Step 2: Convert to fraction form
    13,122.38/18,112.12 = 10,133.66/x
  3. Step 3: Cross multiply
    13,122.38x = 18,112.12 × 10,133.66
  4. Step 4: Simplify right side
    13,122.38x = 183,542,065.96
  5. Step 5: Solve for x
    x = 183,542,065.96/13,122.38
  6. Step 6: Final answer
    x = 13,986.95

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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.