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Finding the Fourth Proportional to 21,661.59, 29,893.01 and 11,725.59

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Solution

The fourth proportional to 21,661.59, 29,893.01 and 11,725.59 is: 16,181.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.59 : 29,893.01 = 11,725.59 : x
  2. Step 2: Convert to fraction form
    21,661.59/29,893.01 = 11,725.59/x
  3. Step 3: Cross multiply
    21,661.59x = 29,893.01 × 11,725.59
  4. Step 4: Simplify right side
    21,661.59x = 350,513,120.50
  5. Step 5: Solve for x
    x = 350,513,120.50/21,661.59
  6. Step 6: Final answer
    x = 16,181.32

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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.