Home / 3,851.49-5,315.05-2,172.89

Finding the Fourth Proportional to 3,851.49, 5,315.05 and 2,172.89

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Solution

The fourth proportional to 3,851.49, 5,315.05 and 2,172.89 is: 2,998.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.49 : 5,315.05 = 2,172.89 : x
  2. Step 2: Convert to fraction form
    3,851.49/5,315.05 = 2,172.89/x
  3. Step 3: Cross multiply
    3,851.49x = 5,315.05 × 2,172.89
  4. Step 4: Simplify right side
    3,851.49x = 11,548,992.42
  5. Step 5: Solve for x
    x = 11,548,992.42/3,851.49
  6. Step 6: Final answer
    x = 2,998.58

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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.