Home / 2,126.35-3,189.55-810.11

Finding the Fourth Proportional to 2,126.35, 3,189.55 and 810.11

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Solution

The fourth proportional to 2,126.35, 3,189.55 and 810.11 is: 1,215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.35 : 3,189.55 = 810.11 : x
  2. Step 2: Convert to fraction form
    2,126.35/3,189.55 = 810.11/x
  3. Step 3: Cross multiply
    2,126.35x = 3,189.55 × 810.11
  4. Step 4: Simplify right side
    2,126.35x = 2,583,892.30
  5. Step 5: Solve for x
    x = 2,583,892.30/2,126.35
  6. Step 6: Final answer
    x = 1,215.18

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Double scale
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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.