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Finding the Fourth Proportional to 13,773.88, 18,991.15 and 11,645.74

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Solution

The fourth proportional to 13,773.88, 18,991.15 and 11,645.74 is: 16,056.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,773.88 : 18,991.15 = 11,645.74 : x
  2. Step 2: Convert to fraction form
    13,773.88/18,991.15 = 11,645.74/x
  3. Step 3: Cross multiply
    13,773.88x = 18,991.15 × 11,645.74
  4. Step 4: Simplify right side
    13,773.88x = 221,165,995.20
  5. Step 5: Solve for x
    x = 221,165,995.20/13,773.88
  6. Step 6: Final answer
    x = 16,056.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.