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Finding the Fourth Proportional to 14,489.91, 19,994.41 and 8,115.62

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Solution

The fourth proportional to 14,489.91, 19,994.41 and 8,115.62 is: 11,198.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,489.91 : 19,994.41 = 8,115.62 : x
  2. Step 2: Convert to fraction form
    14,489.91/19,994.41 = 8,115.62/x
  3. Step 3: Cross multiply
    14,489.91x = 19,994.41 × 8,115.62
  4. Step 4: Simplify right side
    14,489.91x = 162,266,943.86
  5. Step 5: Solve for x
    x = 162,266,943.86/14,489.91
  6. Step 6: Final answer
    x = 11,198.62

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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.