Home / 21,729.44-29,988.12-12,169.52

Finding the Fourth Proportional to 21,729.44, 29,988.12 and 12,169.52

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Solution

The fourth proportional to 21,729.44, 29,988.12 and 12,169.52 is: 16,794.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.44 : 29,988.12 = 12,169.52 : x
  2. Step 2: Convert to fraction form
    21,729.44/29,988.12 = 12,169.52/x
  3. Step 3: Cross multiply
    21,729.44x = 29,988.12 × 12,169.52
  4. Step 4: Simplify right side
    21,729.44x = 364,941,026.10
  5. Step 5: Solve for x
    x = 364,941,026.10/21,729.44
  6. Step 6: Final answer
    x = 16,794.77

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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.