Home / 54,145.11-81,231.50-20,856.24

Finding the Fourth Proportional to 54,145.11, 81,231.50 and 20,856.24

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Solution

The fourth proportional to 54,145.11, 81,231.50 and 20,856.24 is: 31,289.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,145.11 : 81,231.50 = 20,856.24 : x
  2. Step 2: Convert to fraction form
    54,145.11/81,231.50 = 20,856.24/x
  3. Step 3: Cross multiply
    54,145.11x = 81,231.50 × 20,856.24
  4. Step 4: Simplify right side
    54,145.11x = 1,694,183,711.70
  5. Step 5: Solve for x
    x = 1,694,183,711.70/54,145.11
  6. Step 6: Final answer
    x = 31,289.69

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Double scale
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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.