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Finding the Fourth Proportional to 15,659.96, 21,610.31 and 8,945.45

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Solution

The fourth proportional to 15,659.96, 21,610.31 and 8,945.45 is: 12,344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,659.96 : 21,610.31 = 8,945.45 : x
  2. Step 2: Convert to fraction form
    15,659.96/21,610.31 = 8,945.45/x
  3. Step 3: Cross multiply
    15,659.96x = 21,610.31 × 8,945.45
  4. Step 4: Simplify right side
    15,659.96x = 193,313,902.86
  5. Step 5: Solve for x
    x = 193,313,902.86/15,659.96
  6. Step 6: Final answer
    x = 12,344.47

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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.