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Finding the Fourth Proportional to 20,039, 27,655.10 and 11,207

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Solution

The fourth proportional to 20,039, 27,655.10 and 11,207 is: 15,466.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039 : 27,655.10 = 11,207 : x
  2. Step 2: Convert to fraction form
    20,039/27,655.10 = 11,207/x
  3. Step 3: Cross multiply
    20,039x = 27,655.10 × 11,207
  4. Step 4: Simplify right side
    20,039x = 309,930,705.70
  5. Step 5: Solve for x
    x = 309,930,705.70/20,039
  6. Step 6: Final answer
    x = 15,466.38

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.