Home / 3,421.02-5,138.02-2,131.50

Finding the Fourth Proportional to 3,421.02, 5,138.02 and 2,131.50

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Solution

The fourth proportional to 3,421.02, 5,138.02 and 2,131.50 is: 3,201.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.02 : 5,138.02 = 2,131.50 : x
  2. Step 2: Convert to fraction form
    3,421.02/5,138.02 = 2,131.50/x
  3. Step 3: Cross multiply
    3,421.02x = 5,138.02 × 2,131.50
  4. Step 4: Simplify right side
    3,421.02x = 10,951,689.63
  5. Step 5: Solve for x
    x = 10,951,689.63/3,421.02
  6. Step 6: Final answer
    x = 3,201.29

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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.