Home / 18,821.17-28,231.77-4,782.25

Finding the Fourth Proportional to 18,821.17, 28,231.77 and 4,782.25

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Solution

The fourth proportional to 18,821.17, 28,231.77 and 4,782.25 is: 7,173.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,821.17 : 28,231.77 = 4,782.25 : x
  2. Step 2: Convert to fraction form
    18,821.17/28,231.77 = 4,782.25/x
  3. Step 3: Cross multiply
    18,821.17x = 28,231.77 × 4,782.25
  4. Step 4: Simplify right side
    18,821.17x = 135,011,382.08
  5. Step 5: Solve for x
    x = 135,011,382.08/18,821.17
  6. Step 6: Final answer
    x = 7,173.38

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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.