Home / 2,101.50-3,155.85-1,992.06

Finding the Fourth Proportional to 2,101.50, 3,155.85 and 1,992.06

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Solution

The fourth proportional to 2,101.50, 3,155.85 and 1,992.06 is: 2,991.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.50 : 3,155.85 = 1,992.06 : x
  2. Step 2: Convert to fraction form
    2,101.50/3,155.85 = 1,992.06/x
  3. Step 3: Cross multiply
    2,101.50x = 3,155.85 × 1,992.06
  4. Step 4: Simplify right side
    2,101.50x = 6,286,642.55
  5. Step 5: Solve for x
    x = 6,286,642.55/2,101.50
  6. Step 6: Final answer
    x = 2,991.50

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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.