Home / 21,729.12-29,988.09-12,168.85

Finding the Fourth Proportional to 21,729.12, 29,988.09 and 12,168.85

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Solution

The fourth proportional to 21,729.12, 29,988.09 and 12,168.85 is: 16,794.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.12 : 29,988.09 = 12,168.85 : x
  2. Step 2: Convert to fraction form
    21,729.12/29,988.09 = 12,168.85/x
  3. Step 3: Cross multiply
    21,729.12x = 29,988.09 × 12,168.85
  4. Step 4: Simplify right side
    21,729.12x = 364,920,606.48
  5. Step 5: Solve for x
    x = 364,920,606.48/21,729.12
  6. Step 6: Final answer
    x = 16,794.08

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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.