Home / 8,421.40-12,629.68-3,226.08

Finding the Fourth Proportional to 8,421.40, 12,629.68 and 3,226.08

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Solution

The fourth proportional to 8,421.40, 12,629.68 and 3,226.08 is: 4,838.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.40 : 12,629.68 = 3,226.08 : x
  2. Step 2: Convert to fraction form
    8,421.40/12,629.68 = 3,226.08/x
  3. Step 3: Cross multiply
    8,421.40x = 12,629.68 × 3,226.08
  4. Step 4: Simplify right side
    8,421.40x = 40,744,358.05
  5. Step 5: Solve for x
    x = 40,744,358.05/8,421.40
  6. Step 6: Final answer
    x = 4,838.19

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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.