Home / 21,729.84-29,988.82-12,169.23

Finding the Fourth Proportional to 21,729.84, 29,988.82 and 12,169.23

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Solution

The fourth proportional to 21,729.84, 29,988.82 and 12,169.23 is: 16,794.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.84 : 29,988.82 = 12,169.23 : x
  2. Step 2: Convert to fraction form
    21,729.84/29,988.82 = 12,169.23/x
  3. Step 3: Cross multiply
    21,729.84x = 29,988.82 × 12,169.23
  4. Step 4: Simplify right side
    21,729.84x = 364,940,848.01
  5. Step 5: Solve for x
    x = 364,940,848.01/21,729.84
  6. Step 6: Final answer
    x = 16,794.46

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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.