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Finding the Fourth Proportional to 21,393.64, 29,523.62 and 11,963.24

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Solution

The fourth proportional to 21,393.64, 29,523.62 and 11,963.24 is: 16,509.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,393.64 : 29,523.62 = 11,963.24 : x
  2. Step 2: Convert to fraction form
    21,393.64/29,523.62 = 11,963.24/x
  3. Step 3: Cross multiply
    21,393.64x = 29,523.62 × 11,963.24
  4. Step 4: Simplify right side
    21,393.64x = 353,198,151.73
  5. Step 5: Solve for x
    x = 353,198,151.73/21,393.64
  6. Step 6: Final answer
    x = 16,509.49

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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.