Home / 38,991.84-53,806.32-21,998.76

Finding the Fourth Proportional to 38,991.84, 53,806.32 and 21,998.76

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Solution

The fourth proportional to 38,991.84, 53,806.32 and 21,998.76 is: 30,356.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,991.84 : 53,806.32 = 21,998.76 : x
  2. Step 2: Convert to fraction form
    38,991.84/53,806.32 = 21,998.76/x
  3. Step 3: Cross multiply
    38,991.84x = 53,806.32 × 21,998.76
  4. Step 4: Simplify right side
    38,991.84x = 1,183,672,320.16
  5. Step 5: Solve for x
    x = 1,183,672,320.16/38,991.84
  6. Step 6: Final answer
    x = 30,356.92

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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.