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Finding the Fourth Proportional to 8,612.65, 12,886.30 and 5,104.54

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Solution

The fourth proportional to 8,612.65, 12,886.30 and 5,104.54 is: 7,637.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.65 : 12,886.30 = 5,104.54 : x
  2. Step 2: Convert to fraction form
    8,612.65/12,886.30 = 5,104.54/x
  3. Step 3: Cross multiply
    8,612.65x = 12,886.30 × 5,104.54
  4. Step 4: Simplify right side
    8,612.65x = 65,778,633.80
  5. Step 5: Solve for x
    x = 65,778,633.80/8,612.65
  6. Step 6: Final answer
    x = 7,637.44

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.