Home / 18,481.40-27,719.06-5,155.30

Finding the Fourth Proportional to 18,481.40, 27,719.06 and 5,155.30

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Solution

The fourth proportional to 18,481.40, 27,719.06 and 5,155.30 is: 7,732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.40 : 27,719.06 = 5,155.30 : x
  2. Step 2: Convert to fraction form
    18,481.40/27,719.06 = 5,155.30/x
  3. Step 3: Cross multiply
    18,481.40x = 27,719.06 × 5,155.30
  4. Step 4: Simplify right side
    18,481.40x = 142,899,931.42
  5. Step 5: Solve for x
    x = 142,899,931.42/18,481.40
  6. Step 6: Final answer
    x = 7,732.10

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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.