Home / 13,456.60-20,168.70-6,879.40

Finding the Fourth Proportional to 13,456.60, 20,168.70 and 6,879.40

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Solution

The fourth proportional to 13,456.60, 20,168.70 and 6,879.40 is: 10,310.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,456.60 : 20,168.70 = 6,879.40 : x
  2. Step 2: Convert to fraction form
    13,456.60/20,168.70 = 6,879.40/x
  3. Step 3: Cross multiply
    13,456.60x = 20,168.70 × 6,879.40
  4. Step 4: Simplify right side
    13,456.60x = 138,748,554.78
  5. Step 5: Solve for x
    x = 138,748,554.78/13,456.60
  6. Step 6: Final answer
    x = 10,310.82

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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.