Home / 20,720.82-28,593.81-11,770.56

Finding the Fourth Proportional to 20,720.82, 28,593.81 and 11,770.56

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Solution

The fourth proportional to 20,720.82, 28,593.81 and 11,770.56 is: 16,242.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.82 : 28,593.81 = 11,770.56 : x
  2. Step 2: Convert to fraction form
    20,720.82/28,593.81 = 11,770.56/x
  3. Step 3: Cross multiply
    20,720.82x = 28,593.81 × 11,770.56
  4. Step 4: Simplify right side
    20,720.82x = 336,565,156.23
  5. Step 5: Solve for x
    x = 336,565,156.23/20,720.82
  6. Step 6: Final answer
    x = 16,242.85

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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.