Home / 7,977-11,965.40-3,591.36

Finding the Fourth Proportional to 7,977, 11,965.40 and 3,591.36

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Solution

The fourth proportional to 7,977, 11,965.40 and 3,591.36 is: 5,386.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,977 : 11,965.40 = 3,591.36 : x
  2. Step 2: Convert to fraction form
    7,977/11,965.40 = 3,591.36/x
  3. Step 3: Cross multiply
    7,977x = 11,965.40 × 3,591.36
  4. Step 4: Simplify right side
    7,977x = 42,972,058.94
  5. Step 5: Solve for x
    x = 42,972,058.94/7,977
  6. Step 6: Final answer
    x = 5,386.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.