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Finding the Fourth Proportional to 9,884.70, 13,667.13 and 8,639.73

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Solution

The fourth proportional to 9,884.70, 13,667.13 and 8,639.73 is: 11,945.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,884.70 : 13,667.13 = 8,639.73 : x
  2. Step 2: Convert to fraction form
    9,884.70/13,667.13 = 8,639.73/x
  3. Step 3: Cross multiply
    9,884.70x = 13,667.13 × 8,639.73
  4. Step 4: Simplify right side
    9,884.70x = 118,080,313.07
  5. Step 5: Solve for x
    x = 118,080,313.07/9,884.70
  6. Step 6: Final answer
    x = 11,945.77

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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.