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Finding the Fourth Proportional to 20,608.44, 30,915.09 and 15,447.12

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Solution

The fourth proportional to 20,608.44, 30,915.09 and 15,447.12 is: 23,172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.44 : 30,915.09 = 15,447.12 : x
  2. Step 2: Convert to fraction form
    20,608.44/30,915.09 = 15,447.12/x
  3. Step 3: Cross multiply
    20,608.44x = 30,915.09 × 15,447.12
  4. Step 4: Simplify right side
    20,608.44x = 477,549,105.04
  5. Step 5: Solve for x
    x = 477,549,105.04/20,608.44
  6. Step 6: Final answer
    x = 23,172.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.