Home / 3,927.88-5,420.35-2,159.45

Finding the Fourth Proportional to 3,927.88, 5,420.35 and 2,159.45

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Solution

The fourth proportional to 3,927.88, 5,420.35 and 2,159.45 is: 2,979.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.88 : 5,420.35 = 2,159.45 : x
  2. Step 2: Convert to fraction form
    3,927.88/5,420.35 = 2,159.45/x
  3. Step 3: Cross multiply
    3,927.88x = 5,420.35 × 2,159.45
  4. Step 4: Simplify right side
    3,927.88x = 11,704,974.81
  5. Step 5: Solve for x
    x = 11,704,974.81/3,927.88
  6. Step 6: Final answer
    x = 2,979.97

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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.