Home / 12,330.80-18,496.20-10,991.60

Finding the Fourth Proportional to 12,330.80, 18,496.20 and 10,991.60

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Solution

The fourth proportional to 12,330.80, 18,496.20 and 10,991.60 is: 16,487.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,330.80 : 18,496.20 = 10,991.60 : x
  2. Step 2: Convert to fraction form
    12,330.80/18,496.20 = 10,991.60/x
  3. Step 3: Cross multiply
    12,330.80x = 18,496.20 × 10,991.60
  4. Step 4: Simplify right side
    12,330.80x = 203,302,831.92
  5. Step 5: Solve for x
    x = 203,302,831.92/12,330.80
  6. Step 6: Final answer
    x = 16,487.40

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.