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Finding the Fourth Proportional to 8,609.13, 11,879.19 and 5,071.86

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Solution

The fourth proportional to 8,609.13, 11,879.19 and 5,071.86 is: 6,998.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.13 : 11,879.19 = 5,071.86 : x
  2. Step 2: Convert to fraction form
    8,609.13/11,879.19 = 5,071.86/x
  3. Step 3: Cross multiply
    8,609.13x = 11,879.19 × 5,071.86
  4. Step 4: Simplify right side
    8,609.13x = 60,249,588.59
  5. Step 5: Solve for x
    x = 60,249,588.59/8,609.13
  6. Step 6: Final answer
    x = 6,998.34

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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.