Home / 21,871.68-30,183-11,935.68

Finding the Fourth Proportional to 21,871.68, 30,183 and 11,935.68

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Solution

The fourth proportional to 21,871.68, 30,183 and 11,935.68 is: 16,471.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,871.68 : 30,183 = 11,935.68 : x
  2. Step 2: Convert to fraction form
    21,871.68/30,183 = 11,935.68/x
  3. Step 3: Cross multiply
    21,871.68x = 30,183 × 11,935.68
  4. Step 4: Simplify right side
    21,871.68x = 360,254,629.44
  5. Step 5: Solve for x
    x = 360,254,629.44/21,871.68
  6. Step 6: Final answer
    x = 16,471.28

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Half scale
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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.