Home / 2,860.48-3,921.76-2,808.64

Finding the Fourth Proportional to 2,860.48, 3,921.76 and 2,808.64

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Solution

The fourth proportional to 2,860.48, 3,921.76 and 2,808.64 is: 3,850.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,860.48 : 3,921.76 = 2,808.64 : x
  2. Step 2: Convert to fraction form
    2,860.48/3,921.76 = 2,808.64/x
  3. Step 3: Cross multiply
    2,860.48x = 3,921.76 × 2,808.64
  4. Step 4: Simplify right side
    2,860.48x = 11,014,812.01
  5. Step 5: Solve for x
    x = 11,014,812.01/2,860.48
  6. Step 6: Final answer
    x = 3,850.69

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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.