Home / 28,380.82-42,580.95-10,855.66

Finding the Fourth Proportional to 28,380.82, 42,580.95 and 10,855.66

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Solution

The fourth proportional to 28,380.82, 42,580.95 and 10,855.66 is: 16,287.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.82 : 42,580.95 = 10,855.66 : x
  2. Step 2: Convert to fraction form
    28,380.82/42,580.95 = 10,855.66/x
  3. Step 3: Cross multiply
    28,380.82x = 42,580.95 × 10,855.66
  4. Step 4: Simplify right side
    28,380.82x = 462,244,315.68
  5. Step 5: Solve for x
    x = 462,244,315.68/28,380.82
  6. Step 6: Final answer
    x = 16,287.21

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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.