Home / 21,212.78-29,274.95-11,781.32

Finding the Fourth Proportional to 21,212.78, 29,274.95 and 11,781.32

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Solution

The fourth proportional to 21,212.78, 29,274.95 and 11,781.32 is: 16,258.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.78 : 29,274.95 = 11,781.32 : x
  2. Step 2: Convert to fraction form
    21,212.78/29,274.95 = 11,781.32/x
  3. Step 3: Cross multiply
    21,212.78x = 29,274.95 × 11,781.32
  4. Step 4: Simplify right side
    21,212.78x = 344,897,437.01
  5. Step 5: Solve for x
    x = 344,897,437.01/21,212.78
  6. Step 6: Final answer
    x = 16,258.95

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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.