Home / 3,927.67-5,420.19-2,159.39

Finding the Fourth Proportional to 3,927.67, 5,420.19 and 2,159.39

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Solution

The fourth proportional to 3,927.67, 5,420.19 and 2,159.39 is: 2,979.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.67 : 5,420.19 = 2,159.39 : x
  2. Step 2: Convert to fraction form
    3,927.67/5,420.19 = 2,159.39/x
  3. Step 3: Cross multiply
    3,927.67x = 5,420.19 × 2,159.39
  4. Step 4: Simplify right side
    3,927.67x = 11,704,279.74
  5. Step 5: Solve for x
    x = 11,704,279.74/3,927.67
  6. Step 6: Final answer
    x = 2,979.96

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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.