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Finding the Fourth Proportional to 8,739.62, 13,042.25 and 7,805.42

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Solution

The fourth proportional to 8,739.62, 13,042.25 and 7,805.42 is: 11,648.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.62 : 13,042.25 = 7,805.42 : x
  2. Step 2: Convert to fraction form
    8,739.62/13,042.25 = 7,805.42/x
  3. Step 3: Cross multiply
    8,739.62x = 13,042.25 × 7,805.42
  4. Step 4: Simplify right side
    8,739.62x = 101,800,239.00
  5. Step 5: Solve for x
    x = 101,800,239.00/8,739.62
  6. Step 6: Final answer
    x = 11,648.13

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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.