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Finding the Fourth Proportional to 8,618.72, 12,928.08 and 2,775.44

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Solution

The fourth proportional to 8,618.72, 12,928.08 and 2,775.44 is: 4,163.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.72 : 12,928.08 = 2,775.44 : x
  2. Step 2: Convert to fraction form
    8,618.72/12,928.08 = 2,775.44/x
  3. Step 3: Cross multiply
    8,618.72x = 12,928.08 × 2,775.44
  4. Step 4: Simplify right side
    8,618.72x = 35,881,110.36
  5. Step 5: Solve for x
    x = 35,881,110.36/8,618.72
  6. Step 6: Final answer
    x = 4,163.16

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1.5x scale

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.