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Finding the Fourth Proportional to 20,774.57, 28,667.57 and 11,343.12

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Solution

The fourth proportional to 20,774.57, 28,667.57 and 11,343.12 is: 15,652.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.57 : 28,667.57 = 11,343.12 : x
  2. Step 2: Convert to fraction form
    20,774.57/28,667.57 = 11,343.12/x
  3. Step 3: Cross multiply
    20,774.57x = 28,667.57 × 11,343.12
  4. Step 4: Simplify right side
    20,774.57x = 325,179,629.90
  5. Step 5: Solve for x
    x = 325,179,629.90/20,774.57
  6. Step 6: Final answer
    x = 15,652.78

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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.