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Finding the Fourth Proportional to 15,171.31, 20,936.45 and 8,799.13

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Solution

The fourth proportional to 15,171.31, 20,936.45 and 8,799.13 is: 12,142.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.31 : 20,936.45 = 8,799.13 : x
  2. Step 2: Convert to fraction form
    15,171.31/20,936.45 = 8,799.13/x
  3. Step 3: Cross multiply
    15,171.31x = 20,936.45 × 8,799.13
  4. Step 4: Simplify right side
    15,171.31x = 184,222,396.61
  5. Step 5: Solve for x
    x = 184,222,396.61/15,171.31
  6. Step 6: Final answer
    x = 12,142.82

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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.