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Finding the Fourth Proportional to 15,083.81, 20,824.82 and 11,720.27

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Solution

The fourth proportional to 15,083.81, 20,824.82 and 11,720.27 is: 16,181.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,083.81 : 20,824.82 = 11,720.27 : x
  2. Step 2: Convert to fraction form
    15,083.81/20,824.82 = 11,720.27/x
  3. Step 3: Cross multiply
    15,083.81x = 20,824.82 × 11,720.27
  4. Step 4: Simplify right side
    15,083.81x = 244,072,513.10
  5. Step 5: Solve for x
    x = 244,072,513.10/15,083.81
  6. Step 6: Final answer
    x = 16,181.09

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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.