Home / 20,109,936.80-30,164,905.20-7,982,292.80

Finding the Fourth Proportional to 20,109,936.80, 30,164,905.20 and 7,982,292.80

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Solution

The fourth proportional to 20,109,936.80, 30,164,905.20 and 7,982,292.80 is: 11,973,439.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109,936.80 : 30,164,905.20 = 7,982,292.80 : x
  2. Step 2: Convert to fraction form
    20,109,936.80/30,164,905.20 = 7,982,292.80/x
  3. Step 3: Cross multiply
    20,109,936.80x = 30,164,905.20 × 7,982,292.80
  4. Step 4: Simplify right side
    20,109,936.80x = 240,785,105,590,642.56
  5. Step 5: Solve for x
    x = 240,785,105,590,642.56/20,109,936.80
  6. Step 6: Final answer
    x = 11,973,439.20

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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.