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Finding the Fourth Proportional to 18,369.62, 25,355.80 and 10,815.34

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Solution

The fourth proportional to 18,369.62, 25,355.80 and 10,815.34 is: 14,928.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,369.62 : 25,355.80 = 10,815.34 : x
  2. Step 2: Convert to fraction form
    18,369.62/25,355.80 = 10,815.34/x
  3. Step 3: Cross multiply
    18,369.62x = 25,355.80 × 10,815.34
  4. Step 4: Simplify right side
    18,369.62x = 274,231,597.97
  5. Step 5: Solve for x
    x = 274,231,597.97/18,369.62
  6. Step 6: Final answer
    x = 14,928.54

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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.