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Finding the Fourth Proportional to 20,111.20, 30,195.60 and 15,733.60

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Solution

The fourth proportional to 20,111.20, 30,195.60 and 15,733.60 is: 23,622.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.20 : 30,195.60 = 15,733.60 : x
  2. Step 2: Convert to fraction form
    20,111.20/30,195.60 = 15,733.60/x
  3. Step 3: Cross multiply
    20,111.20x = 30,195.60 × 15,733.60
  4. Step 4: Simplify right side
    20,111.20x = 475,085,492.16
  5. Step 5: Solve for x
    x = 475,085,492.16/20,111.20
  6. Step 6: Final answer
    x = 23,622.93

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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.