Home / 3,213.78-4,428.09-2,164.02

Finding the Fourth Proportional to 3,213.78, 4,428.09 and 2,164.02

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Solution

The fourth proportional to 3,213.78, 4,428.09 and 2,164.02 is: 2,981.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,213.78 : 4,428.09 = 2,164.02 : x
  2. Step 2: Convert to fraction form
    3,213.78/4,428.09 = 2,164.02/x
  3. Step 3: Cross multiply
    3,213.78x = 4,428.09 × 2,164.02
  4. Step 4: Simplify right side
    3,213.78x = 9,582,475.32
  5. Step 5: Solve for x
    x = 9,582,475.32/3,213.78
  6. Step 6: Final answer
    x = 2,981.68

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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.