Home / 21,206.39-31,787.44-7,161.57

Finding the Fourth Proportional to 21,206.39, 31,787.44 and 7,161.57

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Solution

The fourth proportional to 21,206.39, 31,787.44 and 7,161.57 is: 10,734.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,206.39 : 31,787.44 = 7,161.57 : x
  2. Step 2: Convert to fraction form
    21,206.39/31,787.44 = 7,161.57/x
  3. Step 3: Cross multiply
    21,206.39x = 31,787.44 × 7,161.57
  4. Step 4: Simplify right side
    21,206.39x = 227,647,958.78
  5. Step 5: Solve for x
    x = 227,647,958.78/21,206.39
  6. Step 6: Final answer
    x = 10,734.88

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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.