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Finding the Fourth Proportional to 21,646.98, 29,872.98 and 12,694.65

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Solution

The fourth proportional to 21,646.98, 29,872.98 and 12,694.65 is: 17,518.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,646.98 : 29,872.98 = 12,694.65 : x
  2. Step 2: Convert to fraction form
    21,646.98/29,872.98 = 12,694.65/x
  3. Step 3: Cross multiply
    21,646.98x = 29,872.98 × 12,694.65
  4. Step 4: Simplify right side
    21,646.98x = 379,227,025.56
  5. Step 5: Solve for x
    x = 379,227,025.56/21,646.98
  6. Step 6: Final answer
    x = 17,518.70

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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.