Home / 15,991.20-22,067.37-8,918.82

Finding the Fourth Proportional to 15,991.20, 22,067.37 and 8,918.82

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Solution

The fourth proportional to 15,991.20, 22,067.37 and 8,918.82 is: 12,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.20 : 22,067.37 = 8,918.82 : x
  2. Step 2: Convert to fraction form
    15,991.20/22,067.37 = 8,918.82/x
  3. Step 3: Cross multiply
    15,991.20x = 22,067.37 × 8,918.82
  4. Step 4: Simplify right side
    15,991.20x = 196,814,900.90
  5. Step 5: Solve for x
    x = 196,814,900.90/15,991.20
  6. Step 6: Final answer
    x = 12,307.70

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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.