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Finding the Fourth Proportional to 39,104.97, 53,965.13 and 21,200.25

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Solution

The fourth proportional to 39,104.97, 53,965.13 and 21,200.25 is: 29,256.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,104.97 : 53,965.13 = 21,200.25 : x
  2. Step 2: Convert to fraction form
    39,104.97/53,965.13 = 21,200.25/x
  3. Step 3: Cross multiply
    39,104.97x = 53,965.13 × 21,200.25
  4. Step 4: Simplify right side
    39,104.97x = 1,144,074,247.28
  5. Step 5: Solve for x
    x = 1,144,074,247.28/39,104.97
  6. Step 6: Final answer
    x = 29,256.49

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Half scale
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Double scale
Find fourth proportional to 39,105.97, 53,966.51 and 21,201.25
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.