Home / 8,078.60-11,147.70-4,722.20

Finding the Fourth Proportional to 8,078.60, 11,147.70 and 4,722.20

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Solution

The fourth proportional to 8,078.60, 11,147.70 and 4,722.20 is: 6,516.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.60 : 11,147.70 = 4,722.20 : x
  2. Step 2: Convert to fraction form
    8,078.60/11,147.70 = 4,722.20/x
  3. Step 3: Cross multiply
    8,078.60x = 11,147.70 × 4,722.20
  4. Step 4: Simplify right side
    8,078.60x = 52,641,668.94
  5. Step 5: Solve for x
    x = 52,641,668.94/8,078.60
  6. Step 6: Final answer
    x = 6,516.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.