Home / 21,308.72-29,406.17-11,877.88

Finding the Fourth Proportional to 21,308.72, 29,406.17 and 11,877.88

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Solution

The fourth proportional to 21,308.72, 29,406.17 and 11,877.88 is: 16,391.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,308.72 : 29,406.17 = 11,877.88 : x
  2. Step 2: Convert to fraction form
    21,308.72/29,406.17 = 11,877.88/x
  3. Step 3: Cross multiply
    21,308.72x = 29,406.17 × 11,877.88
  4. Step 4: Simplify right side
    21,308.72x = 349,282,958.52
  5. Step 5: Solve for x
    x = 349,282,958.52/21,308.72
  6. Step 6: Final answer
    x = 16,391.55

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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.