Home / 18,719.10-28,078.54-7,626.60

Finding the Fourth Proportional to 18,719.10, 28,078.54 and 7,626.60

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Solution

The fourth proportional to 18,719.10, 28,078.54 and 7,626.60 is: 11,439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.10 : 28,078.54 = 7,626.60 : x
  2. Step 2: Convert to fraction form
    18,719.10/28,078.54 = 7,626.60/x
  3. Step 3: Cross multiply
    18,719.10x = 28,078.54 × 7,626.60
  4. Step 4: Simplify right side
    18,719.10x = 214,143,774.10
  5. Step 5: Solve for x
    x = 214,143,774.10/18,719.10
  6. Step 6: Final answer
    x = 11,439.85

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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.