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Finding the Fourth Proportional to 21,472.65, 29,633.97 and 11,913.48

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Solution

The fourth proportional to 21,472.65, 29,633.97 and 11,913.48 is: 16,441.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.65 : 29,633.97 = 11,913.48 : x
  2. Step 2: Convert to fraction form
    21,472.65/29,633.97 = 11,913.48/x
  3. Step 3: Cross multiply
    21,472.65x = 29,633.97 × 11,913.48
  4. Step 4: Simplify right side
    21,472.65x = 353,043,708.92
  5. Step 5: Solve for x
    x = 353,043,708.92/21,472.65
  6. Step 6: Final answer
    x = 16,441.55

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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.