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Finding the Fourth Proportional to 9,896.44, 13,670.42 and 7,921.12

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Solution

The fourth proportional to 9,896.44, 13,670.42 and 7,921.12 is: 10,941.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,896.44 : 13,670.42 = 7,921.12 : x
  2. Step 2: Convert to fraction form
    9,896.44/13,670.42 = 7,921.12/x
  3. Step 3: Cross multiply
    9,896.44x = 13,670.42 × 7,921.12
  4. Step 4: Simplify right side
    9,896.44x = 108,285,037.27
  5. Step 5: Solve for x
    x = 108,285,037.27/9,896.44
  6. Step 6: Final answer
    x = 10,941.82

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Double scale
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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.