Home / 31,912.92-47,877.48-12,189.42

Finding the Fourth Proportional to 31,912.92, 47,877.48 and 12,189.42

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Solution

The fourth proportional to 31,912.92, 47,877.48 and 12,189.42 is: 18,287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,912.92 : 47,877.48 = 12,189.42 : x
  2. Step 2: Convert to fraction form
    31,912.92/47,877.48 = 12,189.42/x
  3. Step 3: Cross multiply
    31,912.92x = 47,877.48 × 12,189.42
  4. Step 4: Simplify right side
    31,912.92x = 583,598,712.26
  5. Step 5: Solve for x
    x = 583,598,712.26/31,912.92
  6. Step 6: Final answer
    x = 18,287.22

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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.