Home / 3,927.80-5,420.46-2,159.44

Finding the Fourth Proportional to 3,927.80, 5,420.46 and 2,159.44

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Solution

The fourth proportional to 3,927.80, 5,420.46 and 2,159.44 is: 2,980.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.80 : 5,420.46 = 2,159.44 : x
  2. Step 2: Convert to fraction form
    3,927.80/5,420.46 = 2,159.44/x
  3. Step 3: Cross multiply
    3,927.80x = 5,420.46 × 2,159.44
  4. Step 4: Simplify right side
    3,927.80x = 11,705,158.14
  5. Step 5: Solve for x
    x = 11,705,158.14/3,927.80
  6. Step 6: Final answer
    x = 2,980.08

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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.