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Finding the Fourth Proportional to 20,072.64, 30,108.78 and 15,693.78

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Solution

The fourth proportional to 20,072.64, 30,108.78 and 15,693.78 is: 23,540.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.64 : 30,108.78 = 15,693.78 : x
  2. Step 2: Convert to fraction form
    20,072.64/30,108.78 = 15,693.78/x
  3. Step 3: Cross multiply
    20,072.64x = 30,108.78 × 15,693.78
  4. Step 4: Simplify right side
    20,072.64x = 472,520,569.39
  5. Step 5: Solve for x
    x = 472,520,569.39/20,072.64
  6. Step 6: Final answer
    x = 23,540.53

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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.