Home / 21,335.78-29,443.43-11,904.95

Finding the Fourth Proportional to 21,335.78, 29,443.43 and 11,904.95

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Solution

The fourth proportional to 21,335.78, 29,443.43 and 11,904.95 is: 16,428.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.78 : 29,443.43 = 11,904.95 : x
  2. Step 2: Convert to fraction form
    21,335.78/29,443.43 = 11,904.95/x
  3. Step 3: Cross multiply
    21,335.78x = 29,443.43 × 11,904.95
  4. Step 4: Simplify right side
    21,335.78x = 350,522,561.98
  5. Step 5: Solve for x
    x = 350,522,561.98/21,335.78
  6. Step 6: Final answer
    x = 16,428.86

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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.