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Finding the Fourth Proportional to 12,553.85, 18,824.87 and 7,290.54

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Solution

The fourth proportional to 12,553.85, 18,824.87 and 7,290.54 is: 10,932.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,553.85 : 18,824.87 = 7,290.54 : x
  2. Step 2: Convert to fraction form
    12,553.85/18,824.87 = 7,290.54/x
  3. Step 3: Cross multiply
    12,553.85x = 18,824.87 × 7,290.54
  4. Step 4: Simplify right side
    12,553.85x = 137,243,485.96
  5. Step 5: Solve for x
    x = 137,243,485.96/12,553.85
  6. Step 6: Final answer
    x = 10,932.38

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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.