Home / 19,891.20-29,793.60-12,086.40

Finding the Fourth Proportional to 19,891.20, 29,793.60 and 12,086.40

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Solution

The fourth proportional to 19,891.20, 29,793.60 and 12,086.40 is: 18,103.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.20 : 29,793.60 = 12,086.40 : x
  2. Step 2: Convert to fraction form
    19,891.20/29,793.60 = 12,086.40/x
  3. Step 3: Cross multiply
    19,891.20x = 29,793.60 × 12,086.40
  4. Step 4: Simplify right side
    19,891.20x = 360,097,367.04
  5. Step 5: Solve for x
    x = 360,097,367.04/19,891.20
  6. Step 6: Final answer
    x = 18,103.35

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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.