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Finding the Fourth Proportional to 8,910.79, 13,309.26 and 8,065.19

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Solution

The fourth proportional to 8,910.79, 13,309.26 and 8,065.19 is: 12,046.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910.79 : 13,309.26 = 8,065.19 : x
  2. Step 2: Convert to fraction form
    8,910.79/13,309.26 = 8,065.19/x
  3. Step 3: Cross multiply
    8,910.79x = 13,309.26 × 8,065.19
  4. Step 4: Simplify right side
    8,910.79x = 107,341,743.93
  5. Step 5: Solve for x
    x = 107,341,743.93/8,910.79
  6. Step 6: Final answer
    x = 12,046.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.