Home / 20,859,122.20-31,288,683.30-13,206,371.80

Finding the Fourth Proportional to 20,859,122.20, 31,288,683.30 and 13,206,371.80

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Solution

The fourth proportional to 20,859,122.20, 31,288,683.30 and 13,206,371.80 is: 19,809,557.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859,122.20 : 31,288,683.30 = 13,206,371.80 : x
  2. Step 2: Convert to fraction form
    20,859,122.20/31,288,683.30 = 13,206,371.80/x
  3. Step 3: Cross multiply
    20,859,122.20x = 31,288,683.30 × 13,206,371.80
  4. Step 4: Simplify right side
    20,859,122.20x = 413,209,984,792,251
  5. Step 5: Solve for x
    x = 413,209,984,792,251/20,859,122.20
  6. Step 6: Final answer
    x = 19,809,557.70

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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.