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Finding the Fourth Proportional to 18,833.20, 28,217.40 and 8,951.20

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Solution

The fourth proportional to 18,833.20, 28,217.40 and 8,951.20 is: 13,411.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,833.20 : 28,217.40 = 8,951.20 : x
  2. Step 2: Convert to fraction form
    18,833.20/28,217.40 = 8,951.20/x
  3. Step 3: Cross multiply
    18,833.20x = 28,217.40 × 8,951.20
  4. Step 4: Simplify right side
    18,833.20x = 252,579,590.88
  5. Step 5: Solve for x
    x = 252,579,590.88/18,833.20
  6. Step 6: Final answer
    x = 13,411.40

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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.