Home / 12,690.73-19,003.29-11,280.25

Finding the Fourth Proportional to 12,690.73, 19,003.29 and 11,280.25

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Solution

The fourth proportional to 12,690.73, 19,003.29 and 11,280.25 is: 16,891.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.73 : 19,003.29 = 11,280.25 : x
  2. Step 2: Convert to fraction form
    12,690.73/19,003.29 = 11,280.25/x
  3. Step 3: Cross multiply
    12,690.73x = 19,003.29 × 11,280.25
  4. Step 4: Simplify right side
    12,690.73x = 214,361,862.02
  5. Step 5: Solve for x
    x = 214,361,862.02/12,690.73
  6. Step 6: Final answer
    x = 16,891.22

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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.