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Finding the Fourth Proportional to 21,256.91, 29,335.91 and 11,825.47

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Solution

The fourth proportional to 21,256.91, 29,335.91 and 11,825.47 is: 16,319.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.91 : 29,335.91 = 11,825.47 : x
  2. Step 2: Convert to fraction form
    21,256.91/29,335.91 = 11,825.47/x
  3. Step 3: Cross multiply
    21,256.91x = 29,335.91 × 11,825.47
  4. Step 4: Simplify right side
    21,256.91x = 346,910,717.82
  5. Step 5: Solve for x
    x = 346,910,717.82/21,256.91
  6. Step 6: Final answer
    x = 16,319.90

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.