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Finding the Fourth Proportional to 21,394.91, 29,525.94 and 11,963.48

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Solution

The fourth proportional to 21,394.91, 29,525.94 and 11,963.48 is: 16,510.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,394.91 : 29,525.94 = 11,963.48 : x
  2. Step 2: Convert to fraction form
    21,394.91/29,525.94 = 11,963.48/x
  3. Step 3: Cross multiply
    21,394.91x = 29,525.94 × 11,963.48
  4. Step 4: Simplify right side
    21,394.91x = 353,232,845.04
  5. Step 5: Solve for x
    x = 353,232,845.04/21,394.91
  6. Step 6: Final answer
    x = 16,510.14

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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.