Home / 3,909.49-5,394.89-2,140.75

Finding the Fourth Proportional to 3,909.49, 5,394.89 and 2,140.75

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Solution

The fourth proportional to 3,909.49, 5,394.89 and 2,140.75 is: 2,954.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.49 : 5,394.89 = 2,140.75 : x
  2. Step 2: Convert to fraction form
    3,909.49/5,394.89 = 2,140.75/x
  3. Step 3: Cross multiply
    3,909.49x = 5,394.89 × 2,140.75
  4. Step 4: Simplify right side
    3,909.49x = 11,549,114.84
  5. Step 5: Solve for x
    x = 11,549,114.84/3,909.49
  6. Step 6: Final answer
    x = 2,954.13

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Half scale
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Double scale
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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.