Home / 21,144.92-31,731.75-11,291.27

Finding the Fourth Proportional to 21,144.92, 31,731.75 and 11,291.27

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Solution

The fourth proportional to 21,144.92, 31,731.75 and 11,291.27 is: 16,944.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.92 : 31,731.75 = 11,291.27 : x
  2. Step 2: Convert to fraction form
    21,144.92/31,731.75 = 11,291.27/x
  3. Step 3: Cross multiply
    21,144.92x = 31,731.75 × 11,291.27
  4. Step 4: Simplify right side
    21,144.92x = 358,291,598.16
  5. Step 5: Solve for x
    x = 358,291,598.16/21,144.92
  6. Step 6: Final answer
    x = 16,944.58

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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.