Home / 2,116.90-3,175.35-1,972.90

Finding the Fourth Proportional to 2,116.90, 3,175.35 and 1,972.90

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Solution

The fourth proportional to 2,116.90, 3,175.35 and 1,972.90 is: 2,959.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,116.90 : 3,175.35 = 1,972.90 : x
  2. Step 2: Convert to fraction form
    2,116.90/3,175.35 = 1,972.90/x
  3. Step 3: Cross multiply
    2,116.90x = 3,175.35 × 1,972.90
  4. Step 4: Simplify right side
    2,116.90x = 6,264,648.02
  5. Step 5: Solve for x
    x = 6,264,648.02/2,116.90
  6. Step 6: Final answer
    x = 2,959.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.