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Finding the Fourth Proportional to 18,422.36, 25,420 and 10,354.44

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Solution

The fourth proportional to 18,422.36, 25,420 and 10,354.44 is: 14,287.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,422.36 : 25,420 = 10,354.44 : x
  2. Step 2: Convert to fraction form
    18,422.36/25,420 = 10,354.44/x
  3. Step 3: Cross multiply
    18,422.36x = 25,420 × 10,354.44
  4. Step 4: Simplify right side
    18,422.36x = 263,209,864.80
  5. Step 5: Solve for x
    x = 263,209,864.80/18,422.36
  6. Step 6: Final answer
    x = 14,287.52

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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.