Home / 12,885.17-19,331.78-3,879.64

Finding the Fourth Proportional to 12,885.17, 19,331.78 and 3,879.64

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Solution

The fourth proportional to 12,885.17, 19,331.78 and 3,879.64 is: 5,820.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.17 : 19,331.78 = 3,879.64 : x
  2. Step 2: Convert to fraction form
    12,885.17/19,331.78 = 3,879.64/x
  3. Step 3: Cross multiply
    12,885.17x = 19,331.78 × 3,879.64
  4. Step 4: Simplify right side
    12,885.17x = 75,000,427.97
  5. Step 5: Solve for x
    x = 75,000,427.97/12,885.17
  6. Step 6: Final answer
    x = 5,820.68

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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.