Home / 13,721.94-20,580.51-3,858.87

Finding the Fourth Proportional to 13,721.94, 20,580.51 and 3,858.87

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Solution

The fourth proportional to 13,721.94, 20,580.51 and 3,858.87 is: 5,787.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.94 : 20,580.51 = 3,858.87 : x
  2. Step 2: Convert to fraction form
    13,721.94/20,580.51 = 3,858.87/x
  3. Step 3: Cross multiply
    13,721.94x = 20,580.51 × 3,858.87
  4. Step 4: Simplify right side
    13,721.94x = 79,417,512.62
  5. Step 5: Solve for x
    x = 79,417,512.62/13,721.94
  6. Step 6: Final answer
    x = 5,787.63

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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.