Home / 12,591.79-18,887.30-3,231.43

Finding the Fourth Proportional to 12,591.79, 18,887.30 and 3,231.43

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Solution

The fourth proportional to 12,591.79, 18,887.30 and 3,231.43 is: 4,847.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.79 : 18,887.30 = 3,231.43 : x
  2. Step 2: Convert to fraction form
    12,591.79/18,887.30 = 3,231.43/x
  3. Step 3: Cross multiply
    12,591.79x = 18,887.30 × 3,231.43
  4. Step 4: Simplify right side
    12,591.79x = 61,032,987.84
  5. Step 5: Solve for x
    x = 61,032,987.84/12,591.79
  6. Step 6: Final answer
    x = 4,847.05

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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.