Home / 20,773.68-31,155.80-5,979.28

Finding the Fourth Proportional to 20,773.68, 31,155.80 and 5,979.28

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Solution

The fourth proportional to 20,773.68, 31,155.80 and 5,979.28 is: 8,967.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,773.68 : 31,155.80 = 5,979.28 : x
  2. Step 2: Convert to fraction form
    20,773.68/31,155.80 = 5,979.28/x
  3. Step 3: Cross multiply
    20,773.68x = 31,155.80 × 5,979.28
  4. Step 4: Simplify right side
    20,773.68x = 186,289,251.82
  5. Step 5: Solve for x
    x = 186,289,251.82/20,773.68
  6. Step 6: Final answer
    x = 8,967.56

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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.