Home / 20,795.82-28,697.78-11,721.12

Finding the Fourth Proportional to 20,795.82, 28,697.78 and 11,721.12

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Solution

The fourth proportional to 20,795.82, 28,697.78 and 11,721.12 is: 16,174.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.82 : 28,697.78 = 11,721.12 : x
  2. Step 2: Convert to fraction form
    20,795.82/28,697.78 = 11,721.12/x
  3. Step 3: Cross multiply
    20,795.82x = 28,697.78 × 11,721.12
  4. Step 4: Simplify right side
    20,795.82x = 336,370,123.11
  5. Step 5: Solve for x
    x = 336,370,123.11/20,795.82
  6. Step 6: Final answer
    x = 16,174.89

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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.