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Finding the Fourth Proportional to 28,715.67, 43,071.67 and 8,993.79

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Solution

The fourth proportional to 28,715.67, 43,071.67 and 8,993.79 is: 13,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,715.67 : 43,071.67 = 8,993.79 : x
  2. Step 2: Convert to fraction form
    28,715.67/43,071.67 = 8,993.79/x
  3. Step 3: Cross multiply
    28,715.67x = 43,071.67 × 8,993.79
  4. Step 4: Simplify right side
    28,715.67x = 387,377,554.93
  5. Step 5: Solve for x
    x = 387,377,554.93/28,715.67
  6. Step 6: Final answer
    x = 13,490.11

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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.