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Finding the Fourth Proportional to 12,553.89, 18,830.97 and 3,788.88

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Solution

The fourth proportional to 12,553.89, 18,830.97 and 3,788.88 is: 5,683.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553.89 : 18,830.97 = 3,788.88 : x
  2. Step 2: Convert to fraction form
    12,553.89/18,830.97 = 3,788.88/x
  3. Step 3: Cross multiply
    12,553.89x = 18,830.97 × 3,788.88
  4. Step 4: Simplify right side
    12,553.89x = 71,348,285.61
  5. Step 5: Solve for x
    x = 71,348,285.61/12,553.89
  6. Step 6: Final answer
    x = 5,683.36

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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.