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Finding the Fourth Proportional to 28,979,991.40, 43,469,987.10 and 21,752,393.80

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Solution

The fourth proportional to 28,979,991.40, 43,469,987.10 and 21,752,393.80 is: 32,628,590.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,979,991.40 : 43,469,987.10 = 21,752,393.80 : x
  2. Step 2: Convert to fraction form
    28,979,991.40/43,469,987.10 = 21,752,393.80/x
  3. Step 3: Cross multiply
    28,979,991.40x = 43,469,987.10 × 21,752,393.80
  4. Step 4: Simplify right side
    28,979,991.40x = 945,576,277,880,120
  5. Step 5: Solve for x
    x = 945,576,277,880,120/28,979,991.40
  6. Step 6: Final answer
    x = 32,628,590.70

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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.