Home / 20,912.17-31,351.52-10,911.90

Finding the Fourth Proportional to 20,912.17, 31,351.52 and 10,911.90

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Solution

The fourth proportional to 20,912.17, 31,351.52 and 10,911.90 is: 16,359.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.17 : 31,351.52 = 10,911.90 : x
  2. Step 2: Convert to fraction form
    20,912.17/31,351.52 = 10,911.90/x
  3. Step 3: Cross multiply
    20,912.17x = 31,351.52 × 10,911.90
  4. Step 4: Simplify right side
    20,912.17x = 342,104,439.77
  5. Step 5: Solve for x
    x = 342,104,439.77/20,912.17
  6. Step 6: Final answer
    x = 16,359.11

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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.