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Finding the Fourth Proportional to 13,577.88, 20,350.50 and 11,789.88

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Solution

The fourth proportional to 13,577.88, 20,350.50 and 11,789.88 is: 17,670.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,577.88 : 20,350.50 = 11,789.88 : x
  2. Step 2: Convert to fraction form
    13,577.88/20,350.50 = 11,789.88/x
  3. Step 3: Cross multiply
    13,577.88x = 20,350.50 × 11,789.88
  4. Step 4: Simplify right side
    13,577.88x = 239,929,952.94
  5. Step 5: Solve for x
    x = 239,929,952.94/13,577.88
  6. Step 6: Final answer
    x = 17,670.65

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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.