Home / 20,747.68-31,059.12-18,972.64

Finding the Fourth Proportional to 20,747.68, 31,059.12 and 18,972.64

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Solution

The fourth proportional to 20,747.68, 31,059.12 and 18,972.64 is: 28,401.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.68 : 31,059.12 = 18,972.64 : x
  2. Step 2: Convert to fraction form
    20,747.68/31,059.12 = 18,972.64/x
  3. Step 3: Cross multiply
    20,747.68x = 31,059.12 × 18,972.64
  4. Step 4: Simplify right side
    20,747.68x = 589,273,502.48
  5. Step 5: Solve for x
    x = 589,273,502.48/20,747.68
  6. Step 6: Final answer
    x = 28,401.90

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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.