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Finding the Fourth Proportional to 28,908.75, 43,363.13 and 7,020.75

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Solution

The fourth proportional to 28,908.75, 43,363.13 and 7,020.75 is: 10,531.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,908.75 : 43,363.13 = 7,020.75 : x
  2. Step 2: Convert to fraction form
    28,908.75/43,363.13 = 7,020.75/x
  3. Step 3: Cross multiply
    28,908.75x = 43,363.13 × 7,020.75
  4. Step 4: Simplify right side
    28,908.75x = 304,441,694.95
  5. Step 5: Solve for x
    x = 304,441,694.95/28,908.75
  6. Step 6: Final answer
    x = 10,531.13

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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.