Home / 27,982.45-38,618.50-20,896.57

Finding the Fourth Proportional to 27,982.45, 38,618.50 and 20,896.57

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Solution

The fourth proportional to 27,982.45, 38,618.50 and 20,896.57 is: 28,839.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,982.45 : 38,618.50 = 20,896.57 : x
  2. Step 2: Convert to fraction form
    27,982.45/38,618.50 = 20,896.57/x
  3. Step 3: Cross multiply
    27,982.45x = 38,618.50 × 20,896.57
  4. Step 4: Simplify right side
    27,982.45x = 806,994,006.53
  5. Step 5: Solve for x
    x = 806,994,006.53/27,982.45
  6. Step 6: Final answer
    x = 28,839.30

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Half scale
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Double scale
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Similar ratio
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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.