Home / 21,416.91-29,556.15-11,985.54

Finding the Fourth Proportional to 21,416.91, 29,556.15 and 11,985.54

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Solution

The fourth proportional to 21,416.91, 29,556.15 and 11,985.54 is: 16,540.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.91 : 29,556.15 = 11,985.54 : x
  2. Step 2: Convert to fraction form
    21,416.91/29,556.15 = 11,985.54/x
  3. Step 3: Cross multiply
    21,416.91x = 29,556.15 × 11,985.54
  4. Step 4: Simplify right side
    21,416.91x = 354,246,418.07
  5. Step 5: Solve for x
    x = 354,246,418.07/21,416.91
  6. Step 6: Final answer
    x = 16,540.50

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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.