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Finding the Fourth Proportional to 13,971,067.20, 20,956,600.80 and 12,291,451.20

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Solution

The fourth proportional to 13,971,067.20, 20,956,600.80 and 12,291,451.20 is: 18,437,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,971,067.20 : 20,956,600.80 = 12,291,451.20 : x
  2. Step 2: Convert to fraction form
    13,971,067.20/20,956,600.80 = 12,291,451.20/x
  3. Step 3: Cross multiply
    13,971,067.20x = 20,956,600.80 × 12,291,451.20
  4. Step 4: Simplify right side
    13,971,067.20x = 257,587,036,051,080.97
  5. Step 5: Solve for x
    x = 257,587,036,051,080.97/13,971,067.20
  6. Step 6: Final answer
    x = 18,437,176.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.