Home / 20,860.80-28,773.06-12,906.78

Finding the Fourth Proportional to 20,860.80, 28,773.06 and 12,906.78

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Solution

The fourth proportional to 20,860.80, 28,773.06 and 12,906.78 is: 17,802.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.80 : 28,773.06 = 12,906.78 : x
  2. Step 2: Convert to fraction form
    20,860.80/28,773.06 = 12,906.78/x
  3. Step 3: Cross multiply
    20,860.80x = 28,773.06 × 12,906.78
  4. Step 4: Simplify right side
    20,860.80x = 371,367,555.35
  5. Step 5: Solve for x
    x = 371,367,555.35/20,860.80
  6. Step 6: Final answer
    x = 17,802.17

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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.