Home / 20,963.13-31,438.03-6,920.55

Finding the Fourth Proportional to 20,963.13, 31,438.03 and 6,920.55

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Solution

The fourth proportional to 20,963.13, 31,438.03 and 6,920.55 is: 10,378.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.13 : 31,438.03 = 6,920.55 : x
  2. Step 2: Convert to fraction form
    20,963.13/31,438.03 = 6,920.55/x
  3. Step 3: Cross multiply
    20,963.13x = 31,438.03 × 6,920.55
  4. Step 4: Simplify right side
    20,963.13x = 217,568,284.02
  5. Step 5: Solve for x
    x = 217,568,284.02/20,963.13
  6. Step 6: Final answer
    x = 10,378.62

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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.