Home / 7,121.72-10,684.11-2,191.25

Finding the Fourth Proportional to 7,121.72, 10,684.11 and 2,191.25

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Solution

The fourth proportional to 7,121.72, 10,684.11 and 2,191.25 is: 3,287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.72 : 10,684.11 = 2,191.25 : x
  2. Step 2: Convert to fraction form
    7,121.72/10,684.11 = 2,191.25/x
  3. Step 3: Cross multiply
    7,121.72x = 10,684.11 × 2,191.25
  4. Step 4: Simplify right side
    7,121.72x = 23,411,556.04
  5. Step 5: Solve for x
    x = 23,411,556.04/7,121.72
  6. Step 6: Final answer
    x = 3,287.35

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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.