Home / 3,908.19-5,393.10-2,139.46

Finding the Fourth Proportional to 3,908.19, 5,393.10 and 2,139.46

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Solution

The fourth proportional to 3,908.19, 5,393.10 and 2,139.46 is: 2,952.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.19 : 5,393.10 = 2,139.46 : x
  2. Step 2: Convert to fraction form
    3,908.19/5,393.10 = 2,139.46/x
  3. Step 3: Cross multiply
    3,908.19x = 5,393.10 × 2,139.46
  4. Step 4: Simplify right side
    3,908.19x = 11,538,321.73
  5. Step 5: Solve for x
    x = 11,538,321.73/3,908.19
  6. Step 6: Final answer
    x = 2,952.34

Related Problems

Find fourth proportional to 1,954.10, 2,696.55 and 1,069.73
Half scale
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Double scale
Find fourth proportional to 3,909.19, 5,394.48 and 2,140.46
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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.