Home / 20,421,270.97-28,181,358.69-11,128,843.64

Finding the Fourth Proportional to 20,421,270.97, 28,181,358.69 and 11,128,843.64

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Solution

The fourth proportional to 20,421,270.97, 28,181,358.69 and 11,128,843.64 is: 15,357,806.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,421,270.97 : 28,181,358.69 = 11,128,843.64 : x
  2. Step 2: Convert to fraction form
    20,421,270.97/28,181,358.69 = 11,128,843.64/x
  3. Step 3: Cross multiply
    20,421,270.97x = 28,181,358.69 × 11,128,843.64
  4. Step 4: Simplify right side
    20,421,270.97x = 313,625,934,423,765.25
  5. Step 5: Solve for x
    x = 313,625,934,423,765.25/20,421,270.97
  6. Step 6: Final answer
    x = 15,357,806.81

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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.