Home / 39,783.28-54,901.10-21,879.44

Finding the Fourth Proportional to 39,783.28, 54,901.10 and 21,879.44

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Solution

The fourth proportional to 39,783.28, 54,901.10 and 21,879.44 is: 30,193.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.28 : 54,901.10 = 21,879.44 : x
  2. Step 2: Convert to fraction form
    39,783.28/54,901.10 = 21,879.44/x
  3. Step 3: Cross multiply
    39,783.28x = 54,901.10 × 21,879.44
  4. Step 4: Simplify right side
    39,783.28x = 1,201,205,323.38
  5. Step 5: Solve for x
    x = 1,201,205,323.38/39,783.28
  6. Step 6: Final answer
    x = 30,193.72

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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.