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Finding the Fourth Proportional to 8,641.20, 11,923.32 and 5,104.20

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Solution

The fourth proportional to 8,641.20, 11,923.32 and 5,104.20 is: 7,042.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.20 : 11,923.32 = 5,104.20 : x
  2. Step 2: Convert to fraction form
    8,641.20/11,923.32 = 5,104.20/x
  3. Step 3: Cross multiply
    8,641.20x = 11,923.32 × 5,104.20
  4. Step 4: Simplify right side
    8,641.20x = 60,859,009.94
  5. Step 5: Solve for x
    x = 60,859,009.94/8,641.20
  6. Step 6: Final answer
    x = 7,042.89

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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.