Home / 12,642.12-18,961.08-3,874.68

Finding the Fourth Proportional to 12,642.12, 18,961.08 and 3,874.68

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Solution

The fourth proportional to 12,642.12, 18,961.08 and 3,874.68 is: 5,811.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.12 : 18,961.08 = 3,874.68 : x
  2. Step 2: Convert to fraction form
    12,642.12/18,961.08 = 3,874.68/x
  3. Step 3: Cross multiply
    12,642.12x = 18,961.08 × 3,874.68
  4. Step 4: Simplify right side
    12,642.12x = 73,468,117.45
  5. Step 5: Solve for x
    x = 73,468,117.45/12,642.12
  6. Step 6: Final answer
    x = 5,811.38

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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.