Home / 2,091.37-3,136.65-1,987.30

Finding the Fourth Proportional to 2,091.37, 3,136.65 and 1,987.30

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Solution

The fourth proportional to 2,091.37, 3,136.65 and 1,987.30 is: 2,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.37 : 3,136.65 = 1,987.30 : x
  2. Step 2: Convert to fraction form
    2,091.37/3,136.65 = 1,987.30/x
  3. Step 3: Cross multiply
    2,091.37x = 3,136.65 × 1,987.30
  4. Step 4: Simplify right side
    2,091.37x = 6,233,464.55
  5. Step 5: Solve for x
    x = 6,233,464.55/2,091.37
  6. Step 6: Final answer
    x = 2,980.57

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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.