Home / 2,115.90-3,172.14-960.84

Finding the Fourth Proportional to 2,115.90, 3,172.14 and 960.84

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Solution

The fourth proportional to 2,115.90, 3,172.14 and 960.84 is: 1,440.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.90 : 3,172.14 = 960.84 : x
  2. Step 2: Convert to fraction form
    2,115.90/3,172.14 = 960.84/x
  3. Step 3: Cross multiply
    2,115.90x = 3,172.14 × 960.84
  4. Step 4: Simplify right side
    2,115.90x = 3,047,919.00
  5. Step 5: Solve for x
    x = 3,047,919.00/2,115.90
  6. Step 6: Final answer
    x = 1,440.48

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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.