Home / 39,903.69-55,069.57-21,998.66

Finding the Fourth Proportional to 39,903.69, 55,069.57 and 21,998.66

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Solution

The fourth proportional to 39,903.69, 55,069.57 and 21,998.66 is: 30,359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,903.69 : 55,069.57 = 21,998.66 : x
  2. Step 2: Convert to fraction form
    39,903.69/55,069.57 = 21,998.66/x
  3. Step 3: Cross multiply
    39,903.69x = 55,069.57 × 21,998.66
  4. Step 4: Simplify right side
    39,903.69x = 1,211,456,963.58
  5. Step 5: Solve for x
    x = 1,211,456,963.58/39,903.69
  6. Step 6: Final answer
    x = 30,359.52

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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.