Home / 9,078.60-13,618.30-5,129.80

Finding the Fourth Proportional to 9,078.60, 13,618.30 and 5,129.80

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Solution

The fourth proportional to 9,078.60, 13,618.30 and 5,129.80 is: 7,694.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,078.60 : 13,618.30 = 5,129.80 : x
  2. Step 2: Convert to fraction form
    9,078.60/13,618.30 = 5,129.80/x
  3. Step 3: Cross multiply
    9,078.60x = 13,618.30 × 5,129.80
  4. Step 4: Simplify right side
    9,078.60x = 69,859,155.34
  5. Step 5: Solve for x
    x = 69,859,155.34/9,078.60
  6. Step 6: Final answer
    x = 7,694.93

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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.