Home / 8,419.20-12,631.50-3,489.36

Finding the Fourth Proportional to 8,419.20, 12,631.50 and 3,489.36

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Solution

The fourth proportional to 8,419.20, 12,631.50 and 3,489.36 is: 5,235.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,419.20 : 12,631.50 = 3,489.36 : x
  2. Step 2: Convert to fraction form
    8,419.20/12,631.50 = 3,489.36/x
  3. Step 3: Cross multiply
    8,419.20x = 12,631.50 × 3,489.36
  4. Step 4: Simplify right side
    8,419.20x = 44,075,850.84
  5. Step 5: Solve for x
    x = 44,075,850.84/8,419.20
  6. Step 6: Final answer
    x = 5,235.16

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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.