Home / 21,025-31,537.50-11,791.72

Finding the Fourth Proportional to 21,025, 31,537.50 and 11,791.72

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Solution

The fourth proportional to 21,025, 31,537.50 and 11,791.72 is: 17,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025 : 31,537.50 = 11,791.72 : x
  2. Step 2: Convert to fraction form
    21,025/31,537.50 = 11,791.72/x
  3. Step 3: Cross multiply
    21,025x = 31,537.50 × 11,791.72
  4. Step 4: Simplify right side
    21,025x = 371,881,369.50
  5. Step 5: Solve for x
    x = 371,881,369.50/21,025
  6. Step 6: Final answer
    x = 17,687.58

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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.