Home / 21,356.44-31,971.58-15,772.70

Finding the Fourth Proportional to 21,356.44, 31,971.58 and 15,772.70

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Solution

The fourth proportional to 21,356.44, 31,971.58 and 15,772.70 is: 23,612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,356.44 : 31,971.58 = 15,772.70 : x
  2. Step 2: Convert to fraction form
    21,356.44/31,971.58 = 15,772.70/x
  3. Step 3: Cross multiply
    21,356.44x = 31,971.58 × 15,772.70
  4. Step 4: Simplify right side
    21,356.44x = 504,278,180.36
  5. Step 5: Solve for x
    x = 504,278,180.36/21,356.44
  6. Step 6: Final answer
    x = 23,612.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.