Home / 3,859.41-5,326.47-2,180.90

Finding the Fourth Proportional to 3,859.41, 5,326.47 and 2,180.90

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Solution

The fourth proportional to 3,859.41, 5,326.47 and 2,180.90 is: 3,009.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.41 : 5,326.47 = 2,180.90 : x
  2. Step 2: Convert to fraction form
    3,859.41/5,326.47 = 2,180.90/x
  3. Step 3: Cross multiply
    3,859.41x = 5,326.47 × 2,180.90
  4. Step 4: Simplify right side
    3,859.41x = 11,616,471.79
  5. Step 5: Solve for x
    x = 11,616,471.79/3,859.41
  6. Step 6: Final answer
    x = 3,009.91

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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.