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Finding the Fourth Proportional to 8,351.38, 12,590.25 and 7,899.29

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Solution

The fourth proportional to 8,351.38, 12,590.25 and 7,899.29 is: 11,908.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,351.38 : 12,590.25 = 7,899.29 : x
  2. Step 2: Convert to fraction form
    8,351.38/12,590.25 = 7,899.29/x
  3. Step 3: Cross multiply
    8,351.38x = 12,590.25 × 7,899.29
  4. Step 4: Simplify right side
    8,351.38x = 99,453,990.56
  5. Step 5: Solve for x
    x = 99,453,990.56/8,351.38
  6. Step 6: Final answer
    x = 11,908.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.