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Finding the Fourth Proportional to 18,869.28, 28,297.44 and 7,185.84

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Solution

The fourth proportional to 18,869.28, 28,297.44 and 7,185.84 is: 10,776.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.28 : 28,297.44 = 7,185.84 : x
  2. Step 2: Convert to fraction form
    18,869.28/28,297.44 = 7,185.84/x
  3. Step 3: Cross multiply
    18,869.28x = 28,297.44 × 7,185.84
  4. Step 4: Simplify right side
    18,869.28x = 203,340,876.25
  5. Step 5: Solve for x
    x = 203,340,876.25/18,869.28
  6. Step 6: Final answer
    x = 10,776.29

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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.