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Finding the Fourth Proportional to 20,091.60, 30,108.60 and 14,785.20

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Solution

The fourth proportional to 20,091.60, 30,108.60 and 14,785.20 is: 22,156.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,091.60 : 30,108.60 = 14,785.20 : x
  2. Step 2: Convert to fraction form
    20,091.60/30,108.60 = 14,785.20/x
  3. Step 3: Cross multiply
    20,091.60x = 30,108.60 × 14,785.20
  4. Step 4: Simplify right side
    20,091.60x = 445,161,672.72
  5. Step 5: Solve for x
    x = 445,161,672.72/20,091.60
  6. Step 6: Final answer
    x = 22,156.61

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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.