Home / 20,386,091.88-28,132,812-11,218,734.36

Finding the Fourth Proportional to 20,386,091.88, 28,132,812 and 11,218,734.36

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Solution

The fourth proportional to 20,386,091.88, 28,132,812 and 11,218,734.36 is: 15,481,856.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386,091.88 : 28,132,812 = 11,218,734.36 : x
  2. Step 2: Convert to fraction form
    20,386,091.88/28,132,812 = 11,218,734.36/x
  3. Step 3: Cross multiply
    20,386,091.88x = 28,132,812 × 11,218,734.36
  4. Step 4: Simplify right side
    20,386,091.88x = 315,614,544,627,820.31
  5. Step 5: Solve for x
    x = 315,614,544,627,820.31/20,386,091.88
  6. Step 6: Final answer
    x = 15,481,856.28

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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.