Home / 31,885.20-47,849.40-20,764.80

Finding the Fourth Proportional to 31,885.20, 47,849.40 and 20,764.80

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Solution

The fourth proportional to 31,885.20, 47,849.40 and 20,764.80 is: 31,161.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,885.20 : 47,849.40 = 20,764.80 : x
  2. Step 2: Convert to fraction form
    31,885.20/47,849.40 = 20,764.80/x
  3. Step 3: Cross multiply
    31,885.20x = 47,849.40 × 20,764.80
  4. Step 4: Simplify right side
    31,885.20x = 993,583,221.12
  5. Step 5: Solve for x
    x = 993,583,221.12/31,885.20
  6. Step 6: Final answer
    x = 31,161.27

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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.