Home / 20,880.24-31,332.78-8,401.38

Finding the Fourth Proportional to 20,880.24, 31,332.78 and 8,401.38

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Solution

The fourth proportional to 20,880.24, 31,332.78 and 8,401.38 is: 12,607.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.24 : 31,332.78 = 8,401.38 : x
  2. Step 2: Convert to fraction form
    20,880.24/31,332.78 = 8,401.38/x
  3. Step 3: Cross multiply
    20,880.24x = 31,332.78 × 8,401.38
  4. Step 4: Simplify right side
    20,880.24x = 263,238,591.24
  5. Step 5: Solve for x
    x = 263,238,591.24/20,880.24
  6. Step 6: Final answer
    x = 12,607.07

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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.