Home / 11,721.78-17,583.75-3,931.74

Finding the Fourth Proportional to 11,721.78, 17,583.75 and 3,931.74

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Solution

The fourth proportional to 11,721.78, 17,583.75 and 3,931.74 is: 5,897.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.78 : 17,583.75 = 3,931.74 : x
  2. Step 2: Convert to fraction form
    11,721.78/17,583.75 = 3,931.74/x
  3. Step 3: Cross multiply
    11,721.78x = 17,583.75 × 3,931.74
  4. Step 4: Simplify right side
    11,721.78x = 69,134,733.23
  5. Step 5: Solve for x
    x = 69,134,733.23/11,721.78
  6. Step 6: Final answer
    x = 5,897.97

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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.