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Finding the Fourth Proportional to 18,202.95, 25,120.50 and 11,915.31

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Solution

The fourth proportional to 18,202.95, 25,120.50 and 11,915.31 is: 16,443.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,202.95 : 25,120.50 = 11,915.31 : x
  2. Step 2: Convert to fraction form
    18,202.95/25,120.50 = 11,915.31/x
  3. Step 3: Cross multiply
    18,202.95x = 25,120.50 × 11,915.31
  4. Step 4: Simplify right side
    18,202.95x = 299,318,544.86
  5. Step 5: Solve for x
    x = 299,318,544.86/18,202.95
  6. Step 6: Final answer
    x = 16,443.41

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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.