Home / 23,171.78-31,977.09-12,561.43

Finding the Fourth Proportional to 23,171.78, 31,977.09 and 12,561.43

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Solution

The fourth proportional to 23,171.78, 31,977.09 and 12,561.43 is: 17,334.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,171.78 : 31,977.09 = 12,561.43 : x
  2. Step 2: Convert to fraction form
    23,171.78/31,977.09 = 12,561.43/x
  3. Step 3: Cross multiply
    23,171.78x = 31,977.09 × 12,561.43
  4. Step 4: Simplify right side
    23,171.78x = 401,677,977.64
  5. Step 5: Solve for x
    x = 401,677,977.64/23,171.78
  6. Step 6: Final answer
    x = 17,334.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.