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Finding the Fourth Proportional to 22,200.56, 30,636 and 12,770.60

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Solution

The fourth proportional to 22,200.56, 30,636 and 12,770.60 is: 17,622.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,200.56 : 30,636 = 12,770.60 : x
  2. Step 2: Convert to fraction form
    22,200.56/30,636 = 12,770.60/x
  3. Step 3: Cross multiply
    22,200.56x = 30,636 × 12,770.60
  4. Step 4: Simplify right side
    22,200.56x = 391,240,101.60
  5. Step 5: Solve for x
    x = 391,240,101.60/22,200.56
  6. Step 6: Final answer
    x = 17,622.98

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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.