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Finding the Fourth Proportional to 12,220.80, 18,327.60 and 4,822.80

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Solution

The fourth proportional to 12,220.80, 18,327.60 and 4,822.80 is: 7,232.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,220.80 : 18,327.60 = 4,822.80 : x
  2. Step 2: Convert to fraction form
    12,220.80/18,327.60 = 4,822.80/x
  3. Step 3: Cross multiply
    12,220.80x = 18,327.60 × 4,822.80
  4. Step 4: Simplify right side
    12,220.80x = 88,390,349.28
  5. Step 5: Solve for x
    x = 88,390,349.28/12,220.80
  6. Step 6: Final answer
    x = 7,232.78

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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.