Home / 2,012.10-2,771.49-1,421.61

Finding the Fourth Proportional to 2,012.10, 2,771.49 and 1,421.61

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Solution

The fourth proportional to 2,012.10, 2,771.49 and 1,421.61 is: 1,958.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,012.10 : 2,771.49 = 1,421.61 : x
  2. Step 2: Convert to fraction form
    2,012.10/2,771.49 = 1,421.61/x
  3. Step 3: Cross multiply
    2,012.10x = 2,771.49 × 1,421.61
  4. Step 4: Simplify right side
    2,012.10x = 3,939,977.90
  5. Step 5: Solve for x
    x = 3,939,977.90/2,012.10
  6. Step 6: Final answer
    x = 1,958.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.