Home / 19,782,221.88-27,236,018.70-15,425,717.88

Finding the Fourth Proportional to 19,782,221.88, 27,236,018.70 and 15,425,717.88

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Solution

The fourth proportional to 19,782,221.88, 27,236,018.70 and 15,425,717.88 is: 21,238,015.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,782,221.88 : 27,236,018.70 = 15,425,717.88 : x
  2. Step 2: Convert to fraction form
    19,782,221.88/27,236,018.70 = 15,425,717.88/x
  3. Step 3: Cross multiply
    19,782,221.88x = 27,236,018.70 × 15,425,717.88
  4. Step 4: Simplify right side
    19,782,221.88x = 420,135,140,640,604.38
  5. Step 5: Solve for x
    x = 420,135,140,640,604.38/19,782,221.88
  6. Step 6: Final answer
    x = 21,238,015.79

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1.5x scale

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.