Home / 21,380.72-29,505.54-11,949.44

Finding the Fourth Proportional to 21,380.72, 29,505.54 and 11,949.44

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Solution

The fourth proportional to 21,380.72, 29,505.54 and 11,949.44 is: 16,490.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.72 : 29,505.54 = 11,949.44 : x
  2. Step 2: Convert to fraction form
    21,380.72/29,505.54 = 11,949.44/x
  3. Step 3: Cross multiply
    21,380.72x = 29,505.54 × 11,949.44
  4. Step 4: Simplify right side
    21,380.72x = 352,574,679.90
  5. Step 5: Solve for x
    x = 352,574,679.90/21,380.72
  6. Step 6: Final answer
    x = 16,490.31

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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.