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Finding the Fourth Proportional to 9,879.44, 13,641.89 and 9,167.18

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Solution

The fourth proportional to 9,879.44, 13,641.89 and 9,167.18 is: 12,658.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,879.44 : 13,641.89 = 9,167.18 : x
  2. Step 2: Convert to fraction form
    9,879.44/13,641.89 = 9,167.18/x
  3. Step 3: Cross multiply
    9,879.44x = 13,641.89 × 9,167.18
  4. Step 4: Simplify right side
    9,879.44x = 125,057,547.12
  5. Step 5: Solve for x
    x = 125,057,547.12/9,879.44
  6. Step 6: Final answer
    x = 12,658.37

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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.