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Finding the Fourth Proportional to 19,251.78, 28,878.69 and 5,401.86

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Solution

The fourth proportional to 19,251.78, 28,878.69 and 5,401.86 is: 8,103.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,251.78 : 28,878.69 = 5,401.86 : x
  2. Step 2: Convert to fraction form
    19,251.78/28,878.69 = 5,401.86/x
  3. Step 3: Cross multiply
    19,251.78x = 28,878.69 × 5,401.86
  4. Step 4: Simplify right side
    19,251.78x = 155,998,640.36
  5. Step 5: Solve for x
    x = 155,998,640.36/19,251.78
  6. Step 6: Final answer
    x = 8,103.08

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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.