Home / 20,815.82-31,221.70-11,452.76

Finding the Fourth Proportional to 20,815.82, 31,221.70 and 11,452.76

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Solution

The fourth proportional to 20,815.82, 31,221.70 and 11,452.76 is: 17,178.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.82 : 31,221.70 = 11,452.76 : x
  2. Step 2: Convert to fraction form
    20,815.82/31,221.70 = 11,452.76/x
  3. Step 3: Cross multiply
    20,815.82x = 31,221.70 × 11,452.76
  4. Step 4: Simplify right side
    20,815.82x = 357,574,452.15
  5. Step 5: Solve for x
    x = 357,574,452.15/20,815.82
  6. Step 6: Final answer
    x = 17,178.02

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1.5x scale

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.