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Finding the Fourth Proportional to 8,391.83, 12,587.01 and 3,948.44

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Solution

The fourth proportional to 8,391.83, 12,587.01 and 3,948.44 is: 5,922.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.83 : 12,587.01 = 3,948.44 : x
  2. Step 2: Convert to fraction form
    8,391.83/12,587.01 = 3,948.44/x
  3. Step 3: Cross multiply
    8,391.83x = 12,587.01 × 3,948.44
  4. Step 4: Simplify right side
    8,391.83x = 49,698,990.83
  5. Step 5: Solve for x
    x = 49,698,990.83/8,391.83
  6. Step 6: Final answer
    x = 5,922.31

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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.