Home / 20,859,079.20-31,288,618.80-13,206,328.80

Finding the Fourth Proportional to 20,859,079.20, 31,288,618.80 and 13,206,328.80

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Solution

The fourth proportional to 20,859,079.20, 31,288,618.80 and 13,206,328.80 is: 19,809,493.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859,079.20 : 31,288,618.80 = 13,206,328.80 : x
  2. Step 2: Convert to fraction form
    20,859,079.20/31,288,618.80 = 13,206,328.80/x
  3. Step 3: Cross multiply
    20,859,079.20x = 31,288,618.80 × 13,206,328.80
  4. Step 4: Simplify right side
    20,859,079.20x = 413,207,787,570,661.50
  5. Step 5: Solve for x
    x = 413,207,787,570,661.50/20,859,079.20
  6. Step 6: Final answer
    x = 19,809,493.20

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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.