Home / 21,728.47-29,982.81-12,167.02

Finding the Fourth Proportional to 21,728.47, 29,982.81 and 12,167.02

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Solution

The fourth proportional to 21,728.47, 29,982.81 and 12,167.02 is: 16,789.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.47 : 29,982.81 = 12,167.02 : x
  2. Step 2: Convert to fraction form
    21,728.47/29,982.81 = 12,167.02/x
  3. Step 3: Cross multiply
    21,728.47x = 29,982.81 × 12,167.02
  4. Step 4: Simplify right side
    21,728.47x = 364,801,513.70
  5. Step 5: Solve for x
    x = 364,801,513.70/21,728.47
  6. Step 6: Final answer
    x = 16,789.11

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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.