Home / 20,763.75-31,145.63-6,912.75

Finding the Fourth Proportional to 20,763.75, 31,145.63 and 6,912.75

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Solution

The fourth proportional to 20,763.75, 31,145.63 and 6,912.75 is: 10,369.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.75 : 31,145.63 = 6,912.75 : x
  2. Step 2: Convert to fraction form
    20,763.75/31,145.63 = 6,912.75/x
  3. Step 3: Cross multiply
    20,763.75x = 31,145.63 × 6,912.75
  4. Step 4: Simplify right side
    20,763.75x = 215,301,919.22
  5. Step 5: Solve for x
    x = 215,301,919.22/20,763.75
  6. Step 6: Final answer
    x = 10,369.13

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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.