Home / 20,761,709.80-31,142,564.70-12,116,936.20

Finding the Fourth Proportional to 20,761,709.80, 31,142,564.70 and 12,116,936.20

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Solution

The fourth proportional to 20,761,709.80, 31,142,564.70 and 12,116,936.20 is: 18,175,404.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761,709.80 : 31,142,564.70 = 12,116,936.20 : x
  2. Step 2: Convert to fraction form
    20,761,709.80/31,142,564.70 = 12,116,936.20/x
  3. Step 3: Cross multiply
    20,761,709.80x = 31,142,564.70 × 12,116,936.20
  4. Step 4: Simplify right side
    20,761,709.80x = 377,352,469,574,272.12
  5. Step 5: Solve for x
    x = 377,352,469,574,272.12/20,761,709.80
  6. Step 6: Final answer
    x = 18,175,404.30

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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.