Home / 12,991.35-17,923.26-8,517.57

Finding the Fourth Proportional to 12,991.35, 17,923.26 and 8,517.57

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Solution

The fourth proportional to 12,991.35, 17,923.26 and 8,517.57 is: 11,751.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.35 : 17,923.26 = 8,517.57 : x
  2. Step 2: Convert to fraction form
    12,991.35/17,923.26 = 8,517.57/x
  3. Step 3: Cross multiply
    12,991.35x = 17,923.26 × 8,517.57
  4. Step 4: Simplify right side
    12,991.35x = 152,662,621.68
  5. Step 5: Solve for x
    x = 152,662,621.68/12,991.35
  6. Step 6: Final answer
    x = 11,751.10

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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.