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Finding the Fourth Proportional to 14,489.58, 19,993.96 and 8,115.29

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Solution

The fourth proportional to 14,489.58, 19,993.96 and 8,115.29 is: 11,198.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,489.58 : 19,993.96 = 8,115.29 : x
  2. Step 2: Convert to fraction form
    14,489.58/19,993.96 = 8,115.29/x
  3. Step 3: Cross multiply
    14,489.58x = 19,993.96 × 8,115.29
  4. Step 4: Simplify right side
    14,489.58x = 162,256,783.65
  5. Step 5: Solve for x
    x = 162,256,783.65/14,489.58
  6. Step 6: Final answer
    x = 11,198.17

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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.