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Finding the Fourth Proportional to 21,472.66, 29,633.97 and 11,913.49

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Solution

The fourth proportional to 21,472.66, 29,633.97 and 11,913.49 is: 16,441.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.66 : 29,633.97 = 11,913.49 : x
  2. Step 2: Convert to fraction form
    21,472.66/29,633.97 = 11,913.49/x
  3. Step 3: Cross multiply
    21,472.66x = 29,633.97 × 11,913.49
  4. Step 4: Simplify right side
    21,472.66x = 353,044,005.26
  5. Step 5: Solve for x
    x = 353,044,005.26/21,472.66
  6. Step 6: Final answer
    x = 16,441.56

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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.