Home / 3,099.78-4,278.96-2,156.94

Finding the Fourth Proportional to 3,099.78, 4,278.96 and 2,156.94

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Solution

The fourth proportional to 3,099.78, 4,278.96 and 2,156.94 is: 2,977.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,099.78 : 4,278.96 = 2,156.94 : x
  2. Step 2: Convert to fraction form
    3,099.78/4,278.96 = 2,156.94/x
  3. Step 3: Cross multiply
    3,099.78x = 4,278.96 × 2,156.94
  4. Step 4: Simplify right side
    3,099.78x = 9,229,459.98
  5. Step 5: Solve for x
    x = 9,229,459.98/3,099.78
  6. Step 6: Final answer
    x = 2,977.46

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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.