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Finding the Fourth Proportional to 18,218.86, 25,089.09 and 15,827.74

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Solution

The fourth proportional to 18,218.86, 25,089.09 and 15,827.74 is: 21,796.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.86 : 25,089.09 = 15,827.74 : x
  2. Step 2: Convert to fraction form
    18,218.86/25,089.09 = 15,827.74/x
  3. Step 3: Cross multiply
    18,218.86x = 25,089.09 × 15,827.74
  4. Step 4: Simplify right side
    18,218.86x = 397,103,593.36
  5. Step 5: Solve for x
    x = 397,103,593.36/18,218.86
  6. Step 6: Final answer
    x = 21,796.29

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1.5x scale

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.