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Finding the Fourth Proportional to 8,618.66, 12,929.21 and 2,773.91

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Solution

The fourth proportional to 8,618.66, 12,929.21 and 2,773.91 is: 4,161.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.66 : 12,929.21 = 2,773.91 : x
  2. Step 2: Convert to fraction form
    8,618.66/12,929.21 = 2,773.91/x
  3. Step 3: Cross multiply
    8,618.66x = 12,929.21 × 2,773.91
  4. Step 4: Simplify right side
    8,618.66x = 35,864,386.40
  5. Step 5: Solve for x
    x = 35,864,386.40/8,618.66
  6. Step 6: Final answer
    x = 4,161.25

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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.