Home / 2,170.64-2,975.94-2,131.76

Finding the Fourth Proportional to 2,170.64, 2,975.94 and 2,131.76

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Solution

The fourth proportional to 2,170.64, 2,975.94 and 2,131.76 is: 2,922.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.64 : 2,975.94 = 2,131.76 : x
  2. Step 2: Convert to fraction form
    2,170.64/2,975.94 = 2,131.76/x
  3. Step 3: Cross multiply
    2,170.64x = 2,975.94 × 2,131.76
  4. Step 4: Simplify right side
    2,170.64x = 6,343,989.85
  5. Step 5: Solve for x
    x = 6,343,989.85/2,170.64
  6. Step 6: Final answer
    x = 2,922.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.