Home / 20,821.43-31,234.02-6,777.81

Finding the Fourth Proportional to 20,821.43, 31,234.02 and 6,777.81

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Solution

The fourth proportional to 20,821.43, 31,234.02 and 6,777.81 is: 10,167.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.43 : 31,234.02 = 6,777.81 : x
  2. Step 2: Convert to fraction form
    20,821.43/31,234.02 = 6,777.81/x
  3. Step 3: Cross multiply
    20,821.43x = 31,234.02 × 6,777.81
  4. Step 4: Simplify right side
    20,821.43x = 211,698,253.10
  5. Step 5: Solve for x
    x = 211,698,253.10/20,821.43
  6. Step 6: Final answer
    x = 10,167.33

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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.