Home / 5,377.88-7,420.82-3,139.50

Finding the Fourth Proportional to 5,377.88, 7,420.82 and 3,139.50

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Solution

The fourth proportional to 5,377.88, 7,420.82 and 3,139.50 is: 4,332.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,377.88 : 7,420.82 = 3,139.50 : x
  2. Step 2: Convert to fraction form
    5,377.88/7,420.82 = 3,139.50/x
  3. Step 3: Cross multiply
    5,377.88x = 7,420.82 × 3,139.50
  4. Step 4: Simplify right side
    5,377.88x = 23,297,664.39
  5. Step 5: Solve for x
    x = 23,297,664.39/5,377.88
  6. Step 6: Final answer
    x = 4,332.13

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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.