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Finding the Fourth Proportional to 15,091.68, 20,826.60 and 8,377.20

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Solution

The fourth proportional to 15,091.68, 20,826.60 and 8,377.20 is: 11,560.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.68 : 20,826.60 = 8,377.20 : x
  2. Step 2: Convert to fraction form
    15,091.68/20,826.60 = 8,377.20/x
  3. Step 3: Cross multiply
    15,091.68x = 20,826.60 × 8,377.20
  4. Step 4: Simplify right side
    15,091.68x = 174,468,593.52
  5. Step 5: Solve for x
    x = 174,468,593.52/15,091.68
  6. Step 6: Final answer
    x = 11,560.58

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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.