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Finding the Fourth Proportional to 12,999.89, 19,503.06 and 3,765.89

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Solution

The fourth proportional to 12,999.89, 19,503.06 and 3,765.89 is: 5,649.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.89 : 19,503.06 = 3,765.89 : x
  2. Step 2: Convert to fraction form
    12,999.89/19,503.06 = 3,765.89/x
  3. Step 3: Cross multiply
    12,999.89x = 19,503.06 × 3,765.89
  4. Step 4: Simplify right side
    12,999.89x = 73,446,378.62
  5. Step 5: Solve for x
    x = 73,446,378.62/12,999.89
  6. Step 6: Final answer
    x = 5,649.77

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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.