Home / 20,755.80-28,643.58-11,802.20

Finding the Fourth Proportional to 20,755.80, 28,643.58 and 11,802.20

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Solution

The fourth proportional to 20,755.80, 28,643.58 and 11,802.20 is: 16,287.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.80 : 28,643.58 = 11,802.20 : x
  2. Step 2: Convert to fraction form
    20,755.80/28,643.58 = 11,802.20/x
  3. Step 3: Cross multiply
    20,755.80x = 28,643.58 × 11,802.20
  4. Step 4: Simplify right side
    20,755.80x = 338,057,259.88
  5. Step 5: Solve for x
    x = 338,057,259.88/20,755.80
  6. Step 6: Final answer
    x = 16,287.36

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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.