Home / 18,901,786.40-28,334,017.20-9,309,312.80

Finding the Fourth Proportional to 18,901,786.40, 28,334,017.20 and 9,309,312.80

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Solution

The fourth proportional to 18,901,786.40, 28,334,017.20 and 9,309,312.80 is: 13,954,777.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,901,786.40 : 28,334,017.20 = 9,309,312.80 : x
  2. Step 2: Convert to fraction form
    18,901,786.40/28,334,017.20 = 9,309,312.80/x
  3. Step 3: Cross multiply
    18,901,786.40x = 28,334,017.20 × 9,309,312.80
  4. Step 4: Simplify right side
    18,901,786.40x = 263,770,228,995,380.19
  5. Step 5: Solve for x
    x = 263,770,228,995,380.19/18,901,786.40
  6. Step 6: Final answer
    x = 13,954,777.79

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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.