Home / 4,005.15-5,486.96-3,855.40

Finding the Fourth Proportional to 4,005.15, 5,486.96 and 3,855.40

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Solution

The fourth proportional to 4,005.15, 5,486.96 and 3,855.40 is: 5,281.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,005.15 : 5,486.96 = 3,855.40 : x
  2. Step 2: Convert to fraction form
    4,005.15/5,486.96 = 3,855.40/x
  3. Step 3: Cross multiply
    4,005.15x = 5,486.96 × 3,855.40
  4. Step 4: Simplify right side
    4,005.15x = 21,154,427.62
  5. Step 5: Solve for x
    x = 21,154,427.62/4,005.15
  6. Step 6: Final answer
    x = 5,281.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.