Home / 20,740.82-28,614.20-12,769.20

Finding the Fourth Proportional to 20,740.82, 28,614.20 and 12,769.20

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Solution

The fourth proportional to 20,740.82, 28,614.20 and 12,769.20 is: 17,616.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.82 : 28,614.20 = 12,769.20 : x
  2. Step 2: Convert to fraction form
    20,740.82/28,614.20 = 12,769.20/x
  3. Step 3: Cross multiply
    20,740.82x = 28,614.20 × 12,769.20
  4. Step 4: Simplify right side
    20,740.82x = 365,380,378.79
  5. Step 5: Solve for x
    x = 365,380,378.79/20,740.82
  6. Step 6: Final answer
    x = 17,616.49

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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.