Home / 2,125.90-3,175.61-1,851.31

Finding the Fourth Proportional to 2,125.90, 3,175.61 and 1,851.31

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Solution

The fourth proportional to 2,125.90, 3,175.61 and 1,851.31 is: 2,765.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.90 : 3,175.61 = 1,851.31 : x
  2. Step 2: Convert to fraction form
    2,125.90/3,175.61 = 1,851.31/x
  3. Step 3: Cross multiply
    2,125.90x = 3,175.61 × 1,851.31
  4. Step 4: Simplify right side
    2,125.90x = 5,879,038.55
  5. Step 5: Solve for x
    x = 5,879,038.55/2,125.90
  6. Step 6: Final answer
    x = 2,765.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.