Home / 12,408.85-18,613.12-3,643.45

Finding the Fourth Proportional to 12,408.85, 18,613.12 and 3,643.45

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Solution

The fourth proportional to 12,408.85, 18,613.12 and 3,643.45 is: 5,465.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.85 : 18,613.12 = 3,643.45 : x
  2. Step 2: Convert to fraction form
    12,408.85/18,613.12 = 3,643.45/x
  3. Step 3: Cross multiply
    12,408.85x = 18,613.12 × 3,643.45
  4. Step 4: Simplify right side
    12,408.85x = 67,815,972.06
  5. Step 5: Solve for x
    x = 67,815,972.06/12,408.85
  6. Step 6: Final answer
    x = 5,465.13

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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.