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Finding the Fourth Proportional to 15,993.12, 22,070.54 and 8,919.99

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Solution

The fourth proportional to 15,993.12, 22,070.54 and 8,919.99 is: 12,309.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.12 : 22,070.54 = 8,919.99 : x
  2. Step 2: Convert to fraction form
    15,993.12/22,070.54 = 8,919.99/x
  3. Step 3: Cross multiply
    15,993.12x = 22,070.54 × 8,919.99
  4. Step 4: Simplify right side
    15,993.12x = 196,869,067.71
  5. Step 5: Solve for x
    x = 196,869,067.71/15,993.12
  6. Step 6: Final answer
    x = 12,309.61

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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.