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Finding the Fourth Proportional to 9,479.80, 13,081.23 and 9,161.31

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Solution

The fourth proportional to 9,479.80, 13,081.23 and 9,161.31 is: 12,641.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,479.80 : 13,081.23 = 9,161.31 : x
  2. Step 2: Convert to fraction form
    9,479.80/13,081.23 = 9,161.31/x
  3. Step 3: Cross multiply
    9,479.80x = 13,081.23 × 9,161.31
  4. Step 4: Simplify right side
    9,479.80x = 119,841,252.27
  5. Step 5: Solve for x
    x = 119,841,252.27/9,479.80
  6. Step 6: Final answer
    x = 12,641.75

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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.