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Finding the Fourth Proportional to 3,871.96, 5,811.18 and 3,509.08

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Solution

The fourth proportional to 3,871.96, 5,811.18 and 3,509.08 is: 5,266.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,871.96 : 5,811.18 = 3,509.08 : x
  2. Step 2: Convert to fraction form
    3,871.96/5,811.18 = 3,509.08/x
  3. Step 3: Cross multiply
    3,871.96x = 5,811.18 × 3,509.08
  4. Step 4: Simplify right side
    3,871.96x = 20,391,895.51
  5. Step 5: Solve for x
    x = 20,391,895.51/3,871.96
  6. Step 6: Final answer
    x = 5,266.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.