Home / 20,639.48-30,938.04-8,154.44

Finding the Fourth Proportional to 20,639.48, 30,938.04 and 8,154.44

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Solution

The fourth proportional to 20,639.48, 30,938.04 and 8,154.44 is: 12,223.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.48 : 30,938.04 = 8,154.44 : x
  2. Step 2: Convert to fraction form
    20,639.48/30,938.04 = 8,154.44/x
  3. Step 3: Cross multiply
    20,639.48x = 30,938.04 × 8,154.44
  4. Step 4: Simplify right side
    20,639.48x = 252,282,390.90
  5. Step 5: Solve for x
    x = 252,282,390.90/20,639.48
  6. Step 6: Final answer
    x = 12,223.29

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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.