Home / 7,091.78-10,639.37-2,161.11

Finding the Fourth Proportional to 7,091.78, 10,639.37 and 2,161.11

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Solution

The fourth proportional to 7,091.78, 10,639.37 and 2,161.11 is: 3,242.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,091.78 : 10,639.37 = 2,161.11 : x
  2. Step 2: Convert to fraction form
    7,091.78/10,639.37 = 2,161.11/x
  3. Step 3: Cross multiply
    7,091.78x = 10,639.37 × 2,161.11
  4. Step 4: Simplify right side
    7,091.78x = 22,992,882.04
  5. Step 5: Solve for x
    x = 22,992,882.04/7,091.78
  6. Step 6: Final answer
    x = 3,242.19

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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.