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Finding the Fourth Proportional to 18,274.66, 25,224.31 and 10,721.31

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Solution

The fourth proportional to 18,274.66, 25,224.31 and 10,721.31 is: 14,798.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,274.66 : 25,224.31 = 10,721.31 : x
  2. Step 2: Convert to fraction form
    18,274.66/25,224.31 = 10,721.31/x
  3. Step 3: Cross multiply
    18,274.66x = 25,224.31 × 10,721.31
  4. Step 4: Simplify right side
    18,274.66x = 270,437,707.74
  5. Step 5: Solve for x
    x = 270,437,707.74/18,274.66
  6. Step 6: Final answer
    x = 14,798.51

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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.