Home / 20,387,722.62-28,128,723.84-11,565,721.80

Finding the Fourth Proportional to 20,387,722.62, 28,128,723.84 and 11,565,721.80

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Solution

The fourth proportional to 20,387,722.62, 28,128,723.84 and 11,565,721.80 is: 15,957,103.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387,722.62 : 28,128,723.84 = 11,565,721.80 : x
  2. Step 2: Convert to fraction form
    20,387,722.62/28,128,723.84 = 11,565,721.80/x
  3. Step 3: Cross multiply
    20,387,722.62x = 28,128,723.84 × 11,565,721.80
  4. Step 4: Simplify right side
    20,387,722.62x = 325,328,994,522,467.75
  5. Step 5: Solve for x
    x = 325,328,994,522,467.75/20,387,722.62
  6. Step 6: Final answer
    x = 15,957,103.23

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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.