Home / 20,721.62-28,595.90-11,769.20

Finding the Fourth Proportional to 20,721.62, 28,595.90 and 11,769.20

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Solution

The fourth proportional to 20,721.62, 28,595.90 and 11,769.20 is: 16,241.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.62 : 28,595.90 = 11,769.20 : x
  2. Step 2: Convert to fraction form
    20,721.62/28,595.90 = 11,769.20/x
  3. Step 3: Cross multiply
    20,721.62x = 28,595.90 × 11,769.20
  4. Step 4: Simplify right side
    20,721.62x = 336,550,859.96
  5. Step 5: Solve for x
    x = 336,550,859.96/20,721.62
  6. Step 6: Final answer
    x = 16,241.53

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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.