Home / 21,456.66-29,611.94-11,899.54

Finding the Fourth Proportional to 21,456.66, 29,611.94 and 11,899.54

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Solution

The fourth proportional to 21,456.66, 29,611.94 and 11,899.54 is: 16,422.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,456.66 : 29,611.94 = 11,899.54 : x
  2. Step 2: Convert to fraction form
    21,456.66/29,611.94 = 11,899.54/x
  3. Step 3: Cross multiply
    21,456.66x = 29,611.94 × 11,899.54
  4. Step 4: Simplify right side
    21,456.66x = 352,368,442.02
  5. Step 5: Solve for x
    x = 352,368,442.02/21,456.66
  6. Step 6: Final answer
    x = 16,422.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.