Home / 3,675.84-5,072.40-2,891.76

Finding the Fourth Proportional to 3,675.84, 5,072.40 and 2,891.76

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Solution

The fourth proportional to 3,675.84, 5,072.40 and 2,891.76 is: 3,990.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,675.84 : 5,072.40 = 2,891.76 : x
  2. Step 2: Convert to fraction form
    3,675.84/5,072.40 = 2,891.76/x
  3. Step 3: Cross multiply
    3,675.84x = 5,072.40 × 2,891.76
  4. Step 4: Simplify right side
    3,675.84x = 14,668,163.42
  5. Step 5: Solve for x
    x = 14,668,163.42/3,675.84
  6. Step 6: Final answer
    x = 3,990.42

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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.