Home / 18,121.36-27,138.30-10,306.48

Finding the Fourth Proportional to 18,121.36, 27,138.30 and 10,306.48

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Solution

The fourth proportional to 18,121.36, 27,138.30 and 10,306.48 is: 15,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.36 : 27,138.30 = 10,306.48 : x
  2. Step 2: Convert to fraction form
    18,121.36/27,138.30 = 10,306.48/x
  3. Step 3: Cross multiply
    18,121.36x = 27,138.30 × 10,306.48
  4. Step 4: Simplify right side
    18,121.36x = 279,700,346.18
  5. Step 5: Solve for x
    x = 279,700,346.18/18,121.36
  6. Step 6: Final answer
    x = 15,434.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.