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Finding the Fourth Proportional to 18,894.10, 28,344.37 and 7,794.71

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Solution

The fourth proportional to 18,894.10, 28,344.37 and 7,794.71 is: 11,693.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.10 : 28,344.37 = 7,794.71 : x
  2. Step 2: Convert to fraction form
    18,894.10/28,344.37 = 7,794.71/x
  3. Step 3: Cross multiply
    18,894.10x = 28,344.37 × 7,794.71
  4. Step 4: Simplify right side
    18,894.10x = 220,936,195.66
  5. Step 5: Solve for x
    x = 220,936,195.66/18,894.10
  6. Step 6: Final answer
    x = 11,693.40

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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.