Home / 20,859,081.70-31,288,622.55-13,206,331.30

Finding the Fourth Proportional to 20,859,081.70, 31,288,622.55 and 13,206,331.30

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Solution

The fourth proportional to 20,859,081.70, 31,288,622.55 and 13,206,331.30 is: 19,809,496.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859,081.70 : 31,288,622.55 = 13,206,331.30 : x
  2. Step 2: Convert to fraction form
    20,859,081.70/31,288,622.55 = 13,206,331.30/x
  3. Step 3: Cross multiply
    20,859,081.70x = 31,288,622.55 × 13,206,331.30
  4. Step 4: Simplify right side
    20,859,081.70x = 413,207,915,315,950.88
  5. Step 5: Solve for x
    x = 413,207,915,315,950.88/20,859,081.70
  6. Step 6: Final answer
    x = 19,809,496.95

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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.