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Finding the Fourth Proportional to 14,405.68, 19,879.24 and 8,118.08

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Solution

The fourth proportional to 14,405.68, 19,879.24 and 8,118.08 is: 11,202.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,405.68 : 19,879.24 = 8,118.08 : x
  2. Step 2: Convert to fraction form
    14,405.68/19,879.24 = 8,118.08/x
  3. Step 3: Cross multiply
    14,405.68x = 19,879.24 × 8,118.08
  4. Step 4: Simplify right side
    14,405.68x = 161,381,260.66
  5. Step 5: Solve for x
    x = 161,381,260.66/14,405.68
  6. Step 6: Final answer
    x = 11,202.61

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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.