Home / 8,618.89-12,928.38-3,424.78

Finding the Fourth Proportional to 8,618.89, 12,928.38 and 3,424.78

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Solution

The fourth proportional to 8,618.89, 12,928.38 and 3,424.78 is: 5,137.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.89 : 12,928.38 = 3,424.78 : x
  2. Step 2: Convert to fraction form
    8,618.89/12,928.38 = 3,424.78/x
  3. Step 3: Cross multiply
    8,618.89x = 12,928.38 × 3,424.78
  4. Step 4: Simplify right side
    8,618.89x = 44,276,857.26
  5. Step 5: Solve for x
    x = 44,276,857.26/8,618.89
  6. Step 6: Final answer
    x = 5,137.19

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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.