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Finding the Fourth Proportional to 18,362.78, 25,342.09 and 10,406.96

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Solution

The fourth proportional to 18,362.78, 25,342.09 and 10,406.96 is: 14,362.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.78 : 25,342.09 = 10,406.96 : x
  2. Step 2: Convert to fraction form
    18,362.78/25,342.09 = 10,406.96/x
  3. Step 3: Cross multiply
    18,362.78x = 25,342.09 × 10,406.96
  4. Step 4: Simplify right side
    18,362.78x = 263,734,116.95
  5. Step 5: Solve for x
    x = 263,734,116.95/18,362.78
  6. Step 6: Final answer
    x = 14,362.43

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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.