Home / 20,821.18-31,233.64-6,777.56

Finding the Fourth Proportional to 20,821.18, 31,233.64 and 6,777.56

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Solution

The fourth proportional to 20,821.18, 31,233.64 and 6,777.56 is: 10,166.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,821.18 : 31,233.64 = 6,777.56 : x
  2. Step 2: Convert to fraction form
    20,821.18/31,233.64 = 6,777.56/x
  3. Step 3: Cross multiply
    20,821.18x = 31,233.64 × 6,777.56
  4. Step 4: Simplify right side
    20,821.18x = 211,687,869.12
  5. Step 5: Solve for x
    x = 211,687,869.12/20,821.18
  6. Step 6: Final answer
    x = 10,166.95

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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.