Home / 18,719.09-28,079.85-5,570.36

Finding the Fourth Proportional to 18,719.09, 28,079.85 and 5,570.36

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Solution

The fourth proportional to 18,719.09, 28,079.85 and 5,570.36 is: 8,355.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.09 : 28,079.85 = 5,570.36 : x
  2. Step 2: Convert to fraction form
    18,719.09/28,079.85 = 5,570.36/x
  3. Step 3: Cross multiply
    18,719.09x = 28,079.85 × 5,570.36
  4. Step 4: Simplify right side
    18,719.09x = 156,414,732.85
  5. Step 5: Solve for x
    x = 156,414,732.85/18,719.09
  6. Step 6: Final answer
    x = 8,355.90

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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.