Home / 21,724-29,979.12-11,788

Finding the Fourth Proportional to 21,724, 29,979.12 and 11,788

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Solution

The fourth proportional to 21,724, 29,979.12 and 11,788 is: 16,267.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,724 : 29,979.12 = 11,788 : x
  2. Step 2: Convert to fraction form
    21,724/29,979.12 = 11,788/x
  3. Step 3: Cross multiply
    21,724x = 29,979.12 × 11,788
  4. Step 4: Simplify right side
    21,724x = 353,393,866.56
  5. Step 5: Solve for x
    x = 353,393,866.56/21,724
  6. Step 6: Final answer
    x = 16,267.44

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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.