Home / 21,731.52-29,988.72-12,171.36

Finding the Fourth Proportional to 21,731.52, 29,988.72 and 12,171.36

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Solution

The fourth proportional to 21,731.52, 29,988.72 and 12,171.36 is: 16,796.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,731.52 : 29,988.72 = 12,171.36 : x
  2. Step 2: Convert to fraction form
    21,731.52/29,988.72 = 12,171.36/x
  3. Step 3: Cross multiply
    21,731.52x = 29,988.72 × 12,171.36
  4. Step 4: Simplify right side
    21,731.52x = 365,003,507.06
  5. Step 5: Solve for x
    x = 365,003,507.06/21,731.52
  6. Step 6: Final answer
    x = 16,796.04

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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.