Home / 8,618.90-12,928.38-3,424.76

Finding the Fourth Proportional to 8,618.90, 12,928.38 and 3,424.76

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Solution

The fourth proportional to 8,618.90, 12,928.38 and 3,424.76 is: 5,137.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.90 : 12,928.38 = 3,424.76 : x
  2. Step 2: Convert to fraction form
    8,618.90/12,928.38 = 3,424.76/x
  3. Step 3: Cross multiply
    8,618.90x = 12,928.38 × 3,424.76
  4. Step 4: Simplify right side
    8,618.90x = 44,276,598.69
  5. Step 5: Solve for x
    x = 44,276,598.69/8,618.90
  6. Step 6: Final answer
    x = 5,137.15

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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.