Home / 9,989.37-13,772.52-8,190.23

Finding the Fourth Proportional to 9,989.37, 13,772.52 and 8,190.23

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Solution

The fourth proportional to 9,989.37, 13,772.52 and 8,190.23 is: 11,292.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.37 : 13,772.52 = 8,190.23 : x
  2. Step 2: Convert to fraction form
    9,989.37/13,772.52 = 8,190.23/x
  3. Step 3: Cross multiply
    9,989.37x = 13,772.52 × 8,190.23
  4. Step 4: Simplify right side
    9,989.37x = 112,800,037.62
  5. Step 5: Solve for x
    x = 112,800,037.62/9,989.37
  6. Step 6: Final answer
    x = 11,292.01

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Double scale
Find fourth proportional to 9,990.37, 13,773.90 and 8,191.23
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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.