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Finding the Fourth Proportional to 18,719.57, 28,083.83 and 6,239.70

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Solution

The fourth proportional to 18,719.57, 28,083.83 and 6,239.70 is: 9,361.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.57 : 28,083.83 = 6,239.70 : x
  2. Step 2: Convert to fraction form
    18,719.57/28,083.83 = 6,239.70/x
  3. Step 3: Cross multiply
    18,719.57x = 28,083.83 × 6,239.70
  4. Step 4: Simplify right side
    18,719.57x = 175,234,642.85
  5. Step 5: Solve for x
    x = 175,234,642.85/18,719.57
  6. Step 6: Final answer
    x = 9,361.04

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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.