Home / 21,696.12-29,929.20-13,724.52

Finding the Fourth Proportional to 21,696.12, 29,929.20 and 13,724.52

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Solution

The fourth proportional to 21,696.12, 29,929.20 and 13,724.52 is: 18,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,696.12 : 29,929.20 = 13,724.52 : x
  2. Step 2: Convert to fraction form
    21,696.12/29,929.20 = 13,724.52/x
  3. Step 3: Cross multiply
    21,696.12x = 29,929.20 × 13,724.52
  4. Step 4: Simplify right side
    21,696.12x = 410,763,903.98
  5. Step 5: Solve for x
    x = 410,763,903.98/21,696.12
  6. Step 6: Final answer
    x = 18,932.60

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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.