Home / 21,431.76-29,576.06-11,871.94

Finding the Fourth Proportional to 21,431.76, 29,576.06 and 11,871.94

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Solution

The fourth proportional to 21,431.76, 29,576.06 and 11,871.94 is: 16,383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.76 : 29,576.06 = 11,871.94 : x
  2. Step 2: Convert to fraction form
    21,431.76/29,576.06 = 11,871.94/x
  3. Step 3: Cross multiply
    21,431.76x = 29,576.06 × 11,871.94
  4. Step 4: Simplify right side
    21,431.76x = 351,125,209.76
  5. Step 5: Solve for x
    x = 351,125,209.76/21,431.76
  6. Step 6: Final answer
    x = 16,383.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.