Home / 3,855.59-5,320.74-2,087.19

Finding the Fourth Proportional to 3,855.59, 5,320.74 and 2,087.19

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Solution

The fourth proportional to 3,855.59, 5,320.74 and 2,087.19 is: 2,880.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.59 : 5,320.74 = 2,087.19 : x
  2. Step 2: Convert to fraction form
    3,855.59/5,320.74 = 2,087.19/x
  3. Step 3: Cross multiply
    3,855.59x = 5,320.74 × 2,087.19
  4. Step 4: Simplify right side
    3,855.59x = 11,105,395.32
  5. Step 5: Solve for x
    x = 11,105,395.32/3,855.59
  6. Step 6: Final answer
    x = 2,880.34

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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.