Home / 8,658.36-12,979.72-3,110.40

Finding the Fourth Proportional to 8,658.36, 12,979.72 and 3,110.40

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Solution

The fourth proportional to 8,658.36, 12,979.72 and 3,110.40 is: 4,662.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.36 : 12,979.72 = 3,110.40 : x
  2. Step 2: Convert to fraction form
    8,658.36/12,979.72 = 3,110.40/x
  3. Step 3: Cross multiply
    8,658.36x = 12,979.72 × 3,110.40
  4. Step 4: Simplify right side
    8,658.36x = 40,372,121.09
  5. Step 5: Solve for x
    x = 40,372,121.09/8,658.36
  6. Step 6: Final answer
    x = 4,662.79

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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.