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Finding the Fourth Proportional to 18,939.96, 28,408.05 and 5,792.45

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Solution

The fourth proportional to 18,939.96, 28,408.05 and 5,792.45 is: 8,688.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.96 : 28,408.05 = 5,792.45 : x
  2. Step 2: Convert to fraction form
    18,939.96/28,408.05 = 5,792.45/x
  3. Step 3: Cross multiply
    18,939.96x = 28,408.05 × 5,792.45
  4. Step 4: Simplify right side
    18,939.96x = 164,552,067.18
  5. Step 5: Solve for x
    x = 164,552,067.18/18,939.96
  6. Step 6: Final answer
    x = 8,688.09

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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.