Home / 21,175.78-31,771.86-15,675.52

Finding the Fourth Proportional to 21,175.78, 31,771.86 and 15,675.52

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Solution

The fourth proportional to 21,175.78, 31,771.86 and 15,675.52 is: 23,519.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.78 : 31,771.86 = 15,675.52 : x
  2. Step 2: Convert to fraction form
    21,175.78/31,771.86 = 15,675.52/x
  3. Step 3: Cross multiply
    21,175.78x = 31,771.86 × 15,675.52
  4. Step 4: Simplify right side
    21,175.78x = 498,040,426.87
  5. Step 5: Solve for x
    x = 498,040,426.87/21,175.78
  6. Step 6: Final answer
    x = 23,519.34

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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.