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Finding the Fourth Proportional to 18,843.82, 28,264.51 and 7,156.73

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Solution

The fourth proportional to 18,843.82, 28,264.51 and 7,156.73 is: 10,734.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,843.82 : 28,264.51 = 7,156.73 : x
  2. Step 2: Convert to fraction form
    18,843.82/28,264.51 = 7,156.73/x
  3. Step 3: Cross multiply
    18,843.82x = 28,264.51 × 7,156.73
  4. Step 4: Simplify right side
    18,843.82x = 202,281,546.26
  5. Step 5: Solve for x
    x = 202,281,546.26/18,843.82
  6. Step 6: Final answer
    x = 10,734.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.