Home / 3,980.75-5,492.94-2,212.13

Finding the Fourth Proportional to 3,980.75, 5,492.94 and 2,212.13

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Solution

The fourth proportional to 3,980.75, 5,492.94 and 2,212.13 is: 3,052.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.75 : 5,492.94 = 2,212.13 : x
  2. Step 2: Convert to fraction form
    3,980.75/5,492.94 = 2,212.13/x
  3. Step 3: Cross multiply
    3,980.75x = 5,492.94 × 2,212.13
  4. Step 4: Simplify right side
    3,980.75x = 12,151,097.36
  5. Step 5: Solve for x
    x = 12,151,097.36/3,980.75
  6. Step 6: Final answer
    x = 3,052.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.