Home / 28,781.98-43,175.16-12,143.80

Finding the Fourth Proportional to 28,781.98, 43,175.16 and 12,143.80

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Solution

The fourth proportional to 28,781.98, 43,175.16 and 12,143.80 is: 18,216.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,781.98 : 43,175.16 = 12,143.80 : x
  2. Step 2: Convert to fraction form
    28,781.98/43,175.16 = 12,143.80/x
  3. Step 3: Cross multiply
    28,781.98x = 43,175.16 × 12,143.80
  4. Step 4: Simplify right side
    28,781.98x = 524,310,508.01
  5. Step 5: Solve for x
    x = 524,310,508.01/28,781.98
  6. Step 6: Final answer
    x = 18,216.62

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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.