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Finding the Fourth Proportional to 18,117.80, 27,163.84 and 7,015.12

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Solution

The fourth proportional to 18,117.80, 27,163.84 and 7,015.12 is: 10,517.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.80 : 27,163.84 = 7,015.12 : x
  2. Step 2: Convert to fraction form
    18,117.80/27,163.84 = 7,015.12/x
  3. Step 3: Cross multiply
    18,117.80x = 27,163.84 × 7,015.12
  4. Step 4: Simplify right side
    18,117.80x = 190,557,597.26
  5. Step 5: Solve for x
    x = 190,557,597.26/18,117.80
  6. Step 6: Final answer
    x = 10,517.70

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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.