Home / 21,408.28-29,544.54-11,977

Finding the Fourth Proportional to 21,408.28, 29,544.54 and 11,977

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Solution

The fourth proportional to 21,408.28, 29,544.54 and 11,977 is: 16,528.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.28 : 29,544.54 = 11,977 : x
  2. Step 2: Convert to fraction form
    21,408.28/29,544.54 = 11,977/x
  3. Step 3: Cross multiply
    21,408.28x = 29,544.54 × 11,977
  4. Step 4: Simplify right side
    21,408.28x = 353,854,955.58
  5. Step 5: Solve for x
    x = 353,854,955.58/21,408.28
  6. Step 6: Final answer
    x = 16,528.88

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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.