Home / 12,408.08-18,609.36-3,640.64

Finding the Fourth Proportional to 12,408.08, 18,609.36 and 3,640.64

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Solution

The fourth proportional to 12,408.08, 18,609.36 and 3,640.64 is: 5,460.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,408.08 : 18,609.36 = 3,640.64 : x
  2. Step 2: Convert to fraction form
    12,408.08/18,609.36 = 3,640.64/x
  3. Step 3: Cross multiply
    12,408.08x = 18,609.36 × 3,640.64
  4. Step 4: Simplify right side
    12,408.08x = 67,749,980.39
  5. Step 5: Solve for x
    x = 67,749,980.39/12,408.08
  6. Step 6: Final answer
    x = 5,460.15

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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.