Home / 21,245.79-31,872.51-17,331.75

Finding the Fourth Proportional to 21,245.79, 31,872.51 and 17,331.75

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Solution

The fourth proportional to 21,245.79, 31,872.51 and 17,331.75 is: 26,000.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.79 : 31,872.51 = 17,331.75 : x
  2. Step 2: Convert to fraction form
    21,245.79/31,872.51 = 17,331.75/x
  3. Step 3: Cross multiply
    21,245.79x = 31,872.51 × 17,331.75
  4. Step 4: Simplify right side
    21,245.79x = 552,406,375.19
  5. Step 5: Solve for x
    x = 552,406,375.19/21,245.79
  6. Step 6: Final answer
    x = 26,000.75

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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.