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Finding the Fourth Proportional to 15,990.98, 22,067.55 and 8,917.25

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Solution

The fourth proportional to 15,990.98, 22,067.55 and 8,917.25 is: 12,305.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,990.98 : 22,067.55 = 8,917.25 : x
  2. Step 2: Convert to fraction form
    15,990.98/22,067.55 = 8,917.25/x
  3. Step 3: Cross multiply
    15,990.98x = 22,067.55 × 8,917.25
  4. Step 4: Simplify right side
    15,990.98x = 196,781,749.90
  5. Step 5: Solve for x
    x = 196,781,749.90/15,990.98
  6. Step 6: Final answer
    x = 12,305.80

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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.