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Finding the Fourth Proportional to 7,717.50, 11,577.90 and 3,100.50

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Solution

The fourth proportional to 7,717.50, 11,577.90 and 3,100.50 is: 4,651.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,717.50 : 11,577.90 = 3,100.50 : x
  2. Step 2: Convert to fraction form
    7,717.50/11,577.90 = 3,100.50/x
  3. Step 3: Cross multiply
    7,717.50x = 11,577.90 × 3,100.50
  4. Step 4: Simplify right side
    7,717.50x = 35,897,278.95
  5. Step 5: Solve for x
    x = 35,897,278.95/7,717.50
  6. Step 6: Final answer
    x = 4,651.41

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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.