Home / 2,138.26-3,186.80-2,135.02

Finding the Fourth Proportional to 2,138.26, 3,186.80 and 2,135.02

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Solution

The fourth proportional to 2,138.26, 3,186.80 and 2,135.02 is: 3,181.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,138.26 : 3,186.80 = 2,135.02 : x
  2. Step 2: Convert to fraction form
    2,138.26/3,186.80 = 2,135.02/x
  3. Step 3: Cross multiply
    2,138.26x = 3,186.80 × 2,135.02
  4. Step 4: Simplify right side
    2,138.26x = 6,803,881.74
  5. Step 5: Solve for x
    x = 6,803,881.74/2,138.26
  6. Step 6: Final answer
    x = 3,181.97

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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.