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Finding the Fourth Proportional to 28,486.08, 42,734.79 and 8,763.89

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Solution

The fourth proportional to 28,486.08, 42,734.79 and 8,763.89 is: 13,147.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.08 : 42,734.79 = 8,763.89 : x
  2. Step 2: Convert to fraction form
    28,486.08/42,734.79 = 8,763.89/x
  3. Step 3: Cross multiply
    28,486.08x = 42,734.79 × 8,763.89
  4. Step 4: Simplify right side
    28,486.08x = 374,522,785.06
  5. Step 5: Solve for x
    x = 374,522,785.06/28,486.08
  6. Step 6: Final answer
    x = 13,147.57

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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.