Home / 13,385.26-18,471.90-8,078.86

Finding the Fourth Proportional to 13,385.26, 18,471.90 and 8,078.86

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Solution

The fourth proportional to 13,385.26, 18,471.90 and 8,078.86 is: 11,148.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.26 : 18,471.90 = 8,078.86 : x
  2. Step 2: Convert to fraction form
    13,385.26/18,471.90 = 8,078.86/x
  3. Step 3: Cross multiply
    13,385.26x = 18,471.90 × 8,078.86
  4. Step 4: Simplify right side
    13,385.26x = 149,231,894.03
  5. Step 5: Solve for x
    x = 149,231,894.03/13,385.26
  6. Step 6: Final answer
    x = 11,148.97

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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.