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Finding the Fourth Proportional to 15,174.20, 20,941.95 and 8,460.92

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Solution

The fourth proportional to 15,174.20, 20,941.95 and 8,460.92 is: 11,676.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174.20 : 20,941.95 = 8,460.92 : x
  2. Step 2: Convert to fraction form
    15,174.20/20,941.95 = 8,460.92/x
  3. Step 3: Cross multiply
    15,174.20x = 20,941.95 × 8,460.92
  4. Step 4: Simplify right side
    15,174.20x = 177,188,163.59
  5. Step 5: Solve for x
    x = 177,188,163.59/15,174.20
  6. Step 6: Final answer
    x = 11,676.94

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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.