Home / 3,927.94-5,420.89-2,159.90

Finding the Fourth Proportional to 3,927.94, 5,420.89 and 2,159.90

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Solution

The fourth proportional to 3,927.94, 5,420.89 and 2,159.90 is: 2,980.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.94 : 5,420.89 = 2,159.90 : x
  2. Step 2: Convert to fraction form
    3,927.94/5,420.89 = 2,159.90/x
  3. Step 3: Cross multiply
    3,927.94x = 5,420.89 × 2,159.90
  4. Step 4: Simplify right side
    3,927.94x = 11,708,580.31
  5. Step 5: Solve for x
    x = 11,708,580.31/3,927.94
  6. Step 6: Final answer
    x = 2,980.85

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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.