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Finding the Fourth Proportional to 20,062.70, 30,080.18 and 8,812.61

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Solution

The fourth proportional to 20,062.70, 30,080.18 and 8,812.61 is: 13,212.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,062.70 : 30,080.18 = 8,812.61 : x
  2. Step 2: Convert to fraction form
    20,062.70/30,080.18 = 8,812.61/x
  3. Step 3: Cross multiply
    20,062.70x = 30,080.18 × 8,812.61
  4. Step 4: Simplify right side
    20,062.70x = 265,084,851.01
  5. Step 5: Solve for x
    x = 265,084,851.01/20,062.70
  6. Step 6: Final answer
    x = 13,212.82

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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.