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Finding the Fourth Proportional to 21,699.56, 29,945.38 and 11,763.56

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Solution

The fourth proportional to 21,699.56, 29,945.38 and 11,763.56 is: 16,233.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.56 : 29,945.38 = 11,763.56 : x
  2. Step 2: Convert to fraction form
    21,699.56/29,945.38 = 11,763.56/x
  3. Step 3: Cross multiply
    21,699.56x = 29,945.38 × 11,763.56
  4. Step 4: Simplify right side
    21,699.56x = 352,264,274.35
  5. Step 5: Solve for x
    x = 352,264,274.35/21,699.56
  6. Step 6: Final answer
    x = 16,233.71

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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.