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Finding the Fourth Proportional to 13,379.58, 20,062.76 and 7,834.32

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Solution

The fourth proportional to 13,379.58, 20,062.76 and 7,834.32 is: 11,747.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,379.58 : 20,062.76 = 7,834.32 : x
  2. Step 2: Convert to fraction form
    13,379.58/20,062.76 = 7,834.32/x
  3. Step 3: Cross multiply
    13,379.58x = 20,062.76 × 7,834.32
  4. Step 4: Simplify right side
    13,379.58x = 157,178,042.75
  5. Step 5: Solve for x
    x = 157,178,042.75/13,379.58
  6. Step 6: Final answer
    x = 11,747.61

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1.5x scale

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.