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Finding the Fourth Proportional to 8,618.06, 12,928.95 and 2,775.13

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Solution

The fourth proportional to 8,618.06, 12,928.95 and 2,775.13 is: 4,163.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.06 : 12,928.95 = 2,775.13 : x
  2. Step 2: Convert to fraction form
    8,618.06/12,928.95 = 2,775.13/x
  3. Step 3: Cross multiply
    8,618.06x = 12,928.95 × 2,775.13
  4. Step 4: Simplify right side
    8,618.06x = 35,879,484.69
  5. Step 5: Solve for x
    x = 35,879,484.69/8,618.06
  6. Step 6: Final answer
    x = 4,163.29

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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.