Home / 21,729.20-29,979.27-12,167.64

Finding the Fourth Proportional to 21,729.20, 29,979.27 and 12,167.64

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Solution

The fourth proportional to 21,729.20, 29,979.27 and 12,167.64 is: 16,787.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.20 : 29,979.27 = 12,167.64 : x
  2. Step 2: Convert to fraction form
    21,729.20/29,979.27 = 12,167.64/x
  3. Step 3: Cross multiply
    21,729.20x = 29,979.27 × 12,167.64
  4. Step 4: Simplify right side
    21,729.20x = 364,776,964.82
  5. Step 5: Solve for x
    x = 364,776,964.82/21,729.20
  6. Step 6: Final answer
    x = 16,787.41

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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.