Home / 3,156.96-4,356.95-1,978.41

Finding the Fourth Proportional to 3,156.96, 4,356.95 and 1,978.41

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Solution

The fourth proportional to 3,156.96, 4,356.95 and 1,978.41 is: 2,730.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.96 : 4,356.95 = 1,978.41 : x
  2. Step 2: Convert to fraction form
    3,156.96/4,356.95 = 1,978.41/x
  3. Step 3: Cross multiply
    3,156.96x = 4,356.95 × 1,978.41
  4. Step 4: Simplify right side
    3,156.96x = 8,619,823.56
  5. Step 5: Solve for x
    x = 8,619,823.56/3,156.96
  6. Step 6: Final answer
    x = 2,730.42

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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.