Home / 21,125.72-31,691.46-7,271

Finding the Fourth Proportional to 21,125.72, 31,691.46 and 7,271

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Solution

The fourth proportional to 21,125.72, 31,691.46 and 7,271 is: 10,907.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,125.72 : 31,691.46 = 7,271 : x
  2. Step 2: Convert to fraction form
    21,125.72/31,691.46 = 7,271/x
  3. Step 3: Cross multiply
    21,125.72x = 31,691.46 × 7,271
  4. Step 4: Simplify right side
    21,125.72x = 230,428,605.66
  5. Step 5: Solve for x
    x = 230,428,605.66/21,125.72
  6. Step 6: Final answer
    x = 10,907.49

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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.