Home / 3,172.65-4,380.02-2,111.85

Finding the Fourth Proportional to 3,172.65, 4,380.02 and 2,111.85

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Solution

The fourth proportional to 3,172.65, 4,380.02 and 2,111.85 is: 2,915.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.65 : 4,380.02 = 2,111.85 : x
  2. Step 2: Convert to fraction form
    3,172.65/4,380.02 = 2,111.85/x
  3. Step 3: Cross multiply
    3,172.65x = 4,380.02 × 2,111.85
  4. Step 4: Simplify right side
    3,172.65x = 9,249,934.68
  5. Step 5: Solve for x
    x = 9,249,934.68/3,172.65
  6. Step 6: Final answer
    x = 2,915.52

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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.