Home / 20,802.06-28,706.79-12,418.62

Finding the Fourth Proportional to 20,802.06, 28,706.79 and 12,418.62

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Solution

The fourth proportional to 20,802.06, 28,706.79 and 12,418.62 is: 17,137.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.06 : 28,706.79 = 12,418.62 : x
  2. Step 2: Convert to fraction form
    20,802.06/28,706.79 = 12,418.62/x
  3. Step 3: Cross multiply
    20,802.06x = 28,706.79 × 12,418.62
  4. Step 4: Simplify right side
    20,802.06x = 356,498,716.43
  5. Step 5: Solve for x
    x = 356,498,716.43/20,802.06
  6. Step 6: Final answer
    x = 17,137.66

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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.