Home / 18,905.40-28,344.20-9,540.86

Finding the Fourth Proportional to 18,905.40, 28,344.20 and 9,540.86

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Solution

The fourth proportional to 18,905.40, 28,344.20 and 9,540.86 is: 14,304.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.40 : 28,344.20 = 9,540.86 : x
  2. Step 2: Convert to fraction form
    18,905.40/28,344.20 = 9,540.86/x
  3. Step 3: Cross multiply
    18,905.40x = 28,344.20 × 9,540.86
  4. Step 4: Simplify right side
    18,905.40x = 270,427,854.59
  5. Step 5: Solve for x
    x = 270,427,854.59/18,905.40
  6. Step 6: Final answer
    x = 14,304.27

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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.