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Finding the Fourth Proportional to 20,088, 30,139.29 and 18,469.62

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Solution

The fourth proportional to 20,088, 30,139.29 and 18,469.62 is: 27,711.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088 : 30,139.29 = 18,469.62 : x
  2. Step 2: Convert to fraction form
    20,088/30,139.29 = 18,469.62/x
  3. Step 3: Cross multiply
    20,088x = 30,139.29 × 18,469.62
  4. Step 4: Simplify right side
    20,088x = 556,661,233.37
  5. Step 5: Solve for x
    x = 556,661,233.37/20,088
  6. Step 6: Final answer
    x = 27,711.13

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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.