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Finding the Fourth Proportional to 9,791.87, 14,690.30 and 3,218.11

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Solution

The fourth proportional to 9,791.87, 14,690.30 and 3,218.11 is: 4,827.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,791.87 : 14,690.30 = 3,218.11 : x
  2. Step 2: Convert to fraction form
    9,791.87/14,690.30 = 3,218.11/x
  3. Step 3: Cross multiply
    9,791.87x = 14,690.30 × 3,218.11
  4. Step 4: Simplify right side
    9,791.87x = 47,274,948.52
  5. Step 5: Solve for x
    x = 47,274,948.52/9,791.87
  6. Step 6: Final answer
    x = 4,827.98

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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.