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Finding the Fourth Proportional to 21,630.42, 29,849.88 and 11,694.42

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Solution

The fourth proportional to 21,630.42, 29,849.88 and 11,694.42 is: 16,138.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.42 : 29,849.88 = 11,694.42 : x
  2. Step 2: Convert to fraction form
    21,630.42/29,849.88 = 11,694.42/x
  3. Step 3: Cross multiply
    21,630.42x = 29,849.88 × 11,694.42
  4. Step 4: Simplify right side
    21,630.42x = 349,077,033.67
  5. Step 5: Solve for x
    x = 349,077,033.67/21,630.42
  6. Step 6: Final answer
    x = 16,138.25

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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.