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Finding the Fourth Proportional to 18,734.26, 28,079.79 and 7,040.02

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Solution

The fourth proportional to 18,734.26, 28,079.79 and 7,040.02 is: 10,551.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,734.26 : 28,079.79 = 7,040.02 : x
  2. Step 2: Convert to fraction form
    18,734.26/28,079.79 = 7,040.02/x
  3. Step 3: Cross multiply
    18,734.26x = 28,079.79 × 7,040.02
  4. Step 4: Simplify right side
    18,734.26x = 197,682,283.20
  5. Step 5: Solve for x
    x = 197,682,283.20/18,734.26
  6. Step 6: Final answer
    x = 10,551.91

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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.