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Finding the Fourth Proportional to 18,794.61, 28,205.55 and 15,140.97

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Solution

The fourth proportional to 18,794.61, 28,205.55 and 15,140.97 is: 22,722.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,794.61 : 28,205.55 = 15,140.97 : x
  2. Step 2: Convert to fraction form
    18,794.61/28,205.55 = 15,140.97/x
  3. Step 3: Cross multiply
    18,794.61x = 28,205.55 × 15,140.97
  4. Step 4: Simplify right side
    18,794.61x = 427,059,386.38
  5. Step 5: Solve for x
    x = 427,059,386.38/18,794.61
  6. Step 6: Final answer
    x = 22,722.44

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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.