Home / 5,418.31-8,127.51-1,720.56

Finding the Fourth Proportional to 5,418.31, 8,127.51 and 1,720.56

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Solution

The fourth proportional to 5,418.31, 8,127.51 and 1,720.56 is: 2,580.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,418.31 : 8,127.51 = 1,720.56 : x
  2. Step 2: Convert to fraction form
    5,418.31/8,127.51 = 1,720.56/x
  3. Step 3: Cross multiply
    5,418.31x = 8,127.51 × 1,720.56
  4. Step 4: Simplify right side
    5,418.31x = 13,983,868.61
  5. Step 5: Solve for x
    x = 13,983,868.61/5,418.31
  6. Step 6: Final answer
    x = 2,580.85

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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.