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Finding the Fourth Proportional to 15,194.97, 20,965.68 and 8,817.87

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Solution

The fourth proportional to 15,194.97, 20,965.68 and 8,817.87 is: 12,166.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,194.97 : 20,965.68 = 8,817.87 : x
  2. Step 2: Convert to fraction form
    15,194.97/20,965.68 = 8,817.87/x
  3. Step 3: Cross multiply
    15,194.97x = 20,965.68 × 8,817.87
  4. Step 4: Simplify right side
    15,194.97x = 184,872,640.70
  5. Step 5: Solve for x
    x = 184,872,640.70/15,194.97
  6. Step 6: Final answer
    x = 12,166.70

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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.