Home / 18,800.40-28,177.20-12,119.28

Finding the Fourth Proportional to 18,800.40, 28,177.20 and 12,119.28

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Solution

The fourth proportional to 18,800.40, 28,177.20 and 12,119.28 is: 18,163.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.40 : 28,177.20 = 12,119.28 : x
  2. Step 2: Convert to fraction form
    18,800.40/28,177.20 = 12,119.28/x
  3. Step 3: Cross multiply
    18,800.40x = 28,177.20 × 12,119.28
  4. Step 4: Simplify right side
    18,800.40x = 341,487,376.42
  5. Step 5: Solve for x
    x = 341,487,376.42/18,800.40
  6. Step 6: Final answer
    x = 18,163.84

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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.