Home / 3,980.12-5,492.30-2,187.56

Finding the Fourth Proportional to 3,980.12, 5,492.30 and 2,187.56

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Solution

The fourth proportional to 3,980.12, 5,492.30 and 2,187.56 is: 3,018.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,980.12 : 5,492.30 = 2,187.56 : x
  2. Step 2: Convert to fraction form
    3,980.12/5,492.30 = 2,187.56/x
  3. Step 3: Cross multiply
    3,980.12x = 5,492.30 × 2,187.56
  4. Step 4: Simplify right side
    3,980.12x = 12,014,735.44
  5. Step 5: Solve for x
    x = 12,014,735.44/3,980.12
  6. Step 6: Final answer
    x = 3,018.69

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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.