Home / 2,126.21-3,187.08-1,188.90

Finding the Fourth Proportional to 2,126.21, 3,187.08 and 1,188.90

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Solution

The fourth proportional to 2,126.21, 3,187.08 and 1,188.90 is: 1,782.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.21 : 3,187.08 = 1,188.90 : x
  2. Step 2: Convert to fraction form
    2,126.21/3,187.08 = 1,188.90/x
  3. Step 3: Cross multiply
    2,126.21x = 3,187.08 × 1,188.90
  4. Step 4: Simplify right side
    2,126.21x = 3,789,119.41
  5. Step 5: Solve for x
    x = 3,789,119.41/2,126.21
  6. Step 6: Final answer
    x = 1,782.10

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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.