Home / 20,578.32-30,869.54-5,585.68

Finding the Fourth Proportional to 20,578.32, 30,869.54 and 5,585.68

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Solution

The fourth proportional to 20,578.32, 30,869.54 and 5,585.68 is: 8,379.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.32 : 30,869.54 = 5,585.68 : x
  2. Step 2: Convert to fraction form
    20,578.32/30,869.54 = 5,585.68/x
  3. Step 3: Cross multiply
    20,578.32x = 30,869.54 × 5,585.68
  4. Step 4: Simplify right side
    20,578.32x = 172,427,478.83
  5. Step 5: Solve for x
    x = 172,427,478.83/20,578.32
  6. Step 6: Final answer
    x = 8,379.09

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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.