Home / 18,291.20-27,436.89-5,143.69

Finding the Fourth Proportional to 18,291.20, 27,436.89 and 5,143.69

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Solution

The fourth proportional to 18,291.20, 27,436.89 and 5,143.69 is: 7,715.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,291.20 : 27,436.89 = 5,143.69 : x
  2. Step 2: Convert to fraction form
    18,291.20/27,436.89 = 5,143.69/x
  3. Step 3: Cross multiply
    18,291.20x = 27,436.89 × 5,143.69
  4. Step 4: Simplify right side
    18,291.20x = 141,126,719.54
  5. Step 5: Solve for x
    x = 141,126,719.54/18,291.20
  6. Step 6: Final answer
    x = 7,715.55

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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.