Home / 12,408.72-18,613.26-3,643.80

Finding the Fourth Proportional to 12,408.72, 18,613.26 and 3,643.80

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Solution

The fourth proportional to 12,408.72, 18,613.26 and 3,643.80 is: 5,465.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.72 : 18,613.26 = 3,643.80 : x
  2. Step 2: Convert to fraction form
    12,408.72/18,613.26 = 3,643.80/x
  3. Step 3: Cross multiply
    12,408.72x = 18,613.26 × 3,643.80
  4. Step 4: Simplify right side
    12,408.72x = 67,822,996.79
  5. Step 5: Solve for x
    x = 67,822,996.79/12,408.72
  6. Step 6: Final answer
    x = 5,465.75

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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.