Home / 2,871.87-3,965.52-1,811.34

Finding the Fourth Proportional to 2,871.87, 3,965.52 and 1,811.34

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Solution

The fourth proportional to 2,871.87, 3,965.52 and 1,811.34 is: 2,501.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,871.87 : 3,965.52 = 1,811.34 : x
  2. Step 2: Convert to fraction form
    2,871.87/3,965.52 = 1,811.34/x
  3. Step 3: Cross multiply
    2,871.87x = 3,965.52 × 1,811.34
  4. Step 4: Simplify right side
    2,871.87x = 7,182,911.79
  5. Step 5: Solve for x
    x = 7,182,911.79/2,871.87
  6. Step 6: Final answer
    x = 2,501.13

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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.