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Finding the Fourth Proportional to 21,907, 30,232.74 and 12,476.44

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Solution

The fourth proportional to 21,907, 30,232.74 and 12,476.44 is: 17,218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,907 : 30,232.74 = 12,476.44 : x
  2. Step 2: Convert to fraction form
    21,907/30,232.74 = 12,476.44/x
  3. Step 3: Cross multiply
    21,907x = 30,232.74 × 12,476.44
  4. Step 4: Simplify right side
    21,907x = 377,196,966.65
  5. Step 5: Solve for x
    x = 377,196,966.65/21,907
  6. Step 6: Final answer
    x = 17,218.10

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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.