Home / 20,972,220.16-28,942,561.74-11,679,790.16

Finding the Fourth Proportional to 20,972,220.16, 28,942,561.74 and 11,679,790.16

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Solution

The fourth proportional to 20,972,220.16, 28,942,561.74 and 11,679,790.16 is: 16,118,610.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972,220.16 : 28,942,561.74 = 11,679,790.16 : x
  2. Step 2: Convert to fraction form
    20,972,220.16/28,942,561.74 = 11,679,790.16/x
  3. Step 3: Cross multiply
    20,972,220.16x = 28,942,561.74 × 11,679,790.16
  4. Step 4: Simplify right side
    20,972,220.16x = 338,043,047,816,044.44
  5. Step 5: Solve for x
    x = 338,043,047,816,044.44/20,972,220.16
  6. Step 6: Final answer
    x = 16,118,610.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.