Home / 2,126.40-3,189.60-2,083.20

Finding the Fourth Proportional to 2,126.40, 3,189.60 and 2,083.20

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Solution

The fourth proportional to 2,126.40, 3,189.60 and 2,083.20 is: 3,124.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,126.40 : 3,189.60 = 2,083.20 : x
  2. Step 2: Convert to fraction form
    2,126.40/3,189.60 = 2,083.20/x
  3. Step 3: Cross multiply
    2,126.40x = 3,189.60 × 2,083.20
  4. Step 4: Simplify right side
    2,126.40x = 6,644,574.72
  5. Step 5: Solve for x
    x = 6,644,574.72/2,126.40
  6. Step 6: Final answer
    x = 3,124.80

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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.