Home / 20,731.56-28,608.72-11,299.92

Finding the Fourth Proportional to 20,731.56, 28,608.72 and 11,299.92

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Solution

The fourth proportional to 20,731.56, 28,608.72 and 11,299.92 is: 15,593.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.56 : 28,608.72 = 11,299.92 : x
  2. Step 2: Convert to fraction form
    20,731.56/28,608.72 = 11,299.92/x
  3. Step 3: Cross multiply
    20,731.56x = 28,608.72 × 11,299.92
  4. Step 4: Simplify right side
    20,731.56x = 323,276,247.30
  5. Step 5: Solve for x
    x = 323,276,247.30/20,731.56
  6. Step 6: Final answer
    x = 15,593.44

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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.