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Finding the Fourth Proportional to 14,578.01, 20,118.89 and 11,917.97

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Solution

The fourth proportional to 14,578.01, 20,118.89 and 11,917.97 is: 16,447.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,578.01 : 20,118.89 = 11,917.97 : x
  2. Step 2: Convert to fraction form
    14,578.01/20,118.89 = 11,917.97/x
  3. Step 3: Cross multiply
    14,578.01x = 20,118.89 × 11,917.97
  4. Step 4: Simplify right side
    14,578.01x = 239,776,267.86
  5. Step 5: Solve for x
    x = 239,776,267.86/14,578.01
  6. Step 6: Final answer
    x = 16,447.81

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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.