Home / 13,715.31-20,573.79-3,855.36

Finding the Fourth Proportional to 13,715.31, 20,573.79 and 3,855.36

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Solution

The fourth proportional to 13,715.31, 20,573.79 and 3,855.36 is: 5,783.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,715.31 : 20,573.79 = 3,855.36 : x
  2. Step 2: Convert to fraction form
    13,715.31/20,573.79 = 3,855.36/x
  3. Step 3: Cross multiply
    13,715.31x = 20,573.79 × 3,855.36
  4. Step 4: Simplify right side
    13,715.31x = 79,319,367.01
  5. Step 5: Solve for x
    x = 79,319,367.01/13,715.31
  6. Step 6: Final answer
    x = 5,783.27

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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.