Home / 21,982.91-30,341.00-20,211.71

Finding the Fourth Proportional to 21,982.91, 30,341.00 and 20,211.71

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Solution

The fourth proportional to 21,982.91, 30,341.00 and 20,211.71 is: 27,896.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,982.91 : 30,341.00 = 20,211.71 : x
  2. Step 2: Convert to fraction form
    21,982.91/30,341.00 = 20,211.71/x
  3. Step 3: Cross multiply
    21,982.91x = 30,341.00 × 20,211.71
  4. Step 4: Simplify right side
    21,982.91x = 613,243,392.05
  5. Step 5: Solve for x
    x = 613,243,392.05/21,982.91
  6. Step 6: Final answer
    x = 27,896.37

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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.