Home / 21,251.72-31,880.10-5,669.48

Finding the Fourth Proportional to 21,251.72, 31,880.10 and 5,669.48

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Solution

The fourth proportional to 21,251.72, 31,880.10 and 5,669.48 is: 8,504.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,251.72 : 31,880.10 = 5,669.48 : x
  2. Step 2: Convert to fraction form
    21,251.72/31,880.10 = 5,669.48/x
  3. Step 3: Cross multiply
    21,251.72x = 31,880.10 × 5,669.48
  4. Step 4: Simplify right side
    21,251.72x = 180,743,589.35
  5. Step 5: Solve for x
    x = 180,743,589.35/21,251.72
  6. Step 6: Final answer
    x = 8,504.89

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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.