Home / 21,717.36-29,969.28-11,781.36

Finding the Fourth Proportional to 21,717.36, 29,969.28 and 11,781.36

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Solution

The fourth proportional to 21,717.36, 29,969.28 and 11,781.36 is: 16,257.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,717.36 : 29,969.28 = 11,781.36 : x
  2. Step 2: Convert to fraction form
    21,717.36/29,969.28 = 11,781.36/x
  3. Step 3: Cross multiply
    21,717.36x = 29,969.28 × 11,781.36
  4. Step 4: Simplify right side
    21,717.36x = 353,078,876.62
  5. Step 5: Solve for x
    x = 353,078,876.62/21,717.36
  6. Step 6: Final answer
    x = 16,257.91

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1.5x scale

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.