Home / 28,828.80-43,243.20-18,979.20

Finding the Fourth Proportional to 28,828.80, 43,243.20 and 18,979.20

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Solution

The fourth proportional to 28,828.80, 43,243.20 and 18,979.20 is: 28,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,828.80 : 43,243.20 = 18,979.20 : x
  2. Step 2: Convert to fraction form
    28,828.80/43,243.20 = 18,979.20/x
  3. Step 3: Cross multiply
    28,828.80x = 43,243.20 × 18,979.20
  4. Step 4: Simplify right side
    28,828.80x = 820,721,341.44
  5. Step 5: Solve for x
    x = 820,721,341.44/28,828.80
  6. Step 6: Final answer
    x = 28,468.80

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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.