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Finding the Fourth Proportional to 18,423.21, 25,422.62 and 10,356.42

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Solution

The fourth proportional to 18,423.21, 25,422.62 and 10,356.42 is: 14,291.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.21 : 25,422.62 = 10,356.42 : x
  2. Step 2: Convert to fraction form
    18,423.21/25,422.62 = 10,356.42/x
  3. Step 3: Cross multiply
    18,423.21x = 25,422.62 × 10,356.42
  4. Step 4: Simplify right side
    18,423.21x = 263,287,278.44
  5. Step 5: Solve for x
    x = 263,287,278.44/18,423.21
  6. Step 6: Final answer
    x = 14,291.06

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.