Home / 20,704,990.80-31,057,486.20-13,165,381.20

Finding the Fourth Proportional to 20,704,990.80, 31,057,486.20 and 13,165,381.20

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Solution

The fourth proportional to 20,704,990.80, 31,057,486.20 and 13,165,381.20 is: 19,748,071.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704,990.80 : 31,057,486.20 = 13,165,381.20 : x
  2. Step 2: Convert to fraction form
    20,704,990.80/31,057,486.20 = 13,165,381.20/x
  3. Step 3: Cross multiply
    20,704,990.80x = 31,057,486.20 × 13,165,381.20
  4. Step 4: Simplify right side
    20,704,990.80x = 408,883,644,936,739.44
  5. Step 5: Solve for x
    x = 408,883,644,936,739.44/20,704,990.80
  6. Step 6: Final answer
    x = 19,748,071.80

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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.