Home / 20,948.12-28,908.92-11,516.70

Finding the Fourth Proportional to 20,948.12, 28,908.92 and 11,516.70

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Solution

The fourth proportional to 20,948.12, 28,908.92 and 11,516.70 is: 15,893.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,948.12 : 28,908.92 = 11,516.70 : x
  2. Step 2: Convert to fraction form
    20,948.12/28,908.92 = 11,516.70/x
  3. Step 3: Cross multiply
    20,948.12x = 28,908.92 × 11,516.70
  4. Step 4: Simplify right side
    20,948.12x = 332,935,358.96
  5. Step 5: Solve for x
    x = 332,935,358.96/20,948.12
  6. Step 6: Final answer
    x = 15,893.33

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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.