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Finding the Fourth Proportional to 8,791, 13,188.70 and 2,635

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Solution

The fourth proportional to 8,791, 13,188.70 and 2,635 is: 3,953.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791 : 13,188.70 = 2,635 : x
  2. Step 2: Convert to fraction form
    8,791/13,188.70 = 2,635/x
  3. Step 3: Cross multiply
    8,791x = 13,188.70 × 2,635
  4. Step 4: Simplify right side
    8,791x = 34,752,224.50
  5. Step 5: Solve for x
    x = 34,752,224.50/8,791
  6. Step 6: Final answer
    x = 3,953.16

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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.