Home / 20,948.72-28,908.50-11,517.21

Finding the Fourth Proportional to 20,948.72, 28,908.50 and 11,517.21

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Solution

The fourth proportional to 20,948.72, 28,908.50 and 11,517.21 is: 15,893.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.72 : 28,908.50 = 11,517.21 : x
  2. Step 2: Convert to fraction form
    20,948.72/28,908.50 = 11,517.21/x
  3. Step 3: Cross multiply
    20,948.72x = 28,908.50 × 11,517.21
  4. Step 4: Simplify right side
    20,948.72x = 332,945,207.70
  5. Step 5: Solve for x
    x = 332,945,207.70/20,948.72
  6. Step 6: Final answer
    x = 15,893.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.