Home / 3,853.91-5,318.36-2,085.51

Finding the Fourth Proportional to 3,853.91, 5,318.36 and 2,085.51

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Solution

The fourth proportional to 3,853.91, 5,318.36 and 2,085.51 is: 2,877.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,853.91 : 5,318.36 = 2,085.51 : x
  2. Step 2: Convert to fraction form
    3,853.91/5,318.36 = 2,085.51/x
  3. Step 3: Cross multiply
    3,853.91x = 5,318.36 × 2,085.51
  4. Step 4: Simplify right side
    3,853.91x = 11,091,480.38
  5. Step 5: Solve for x
    x = 11,091,480.38/3,853.91
  6. Step 6: Final answer
    x = 2,877.98

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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.