Home / 2,687.07-4,030.57-2,145.80

Finding the Fourth Proportional to 2,687.07, 4,030.57 and 2,145.80

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Solution

The fourth proportional to 2,687.07, 4,030.57 and 2,145.80 is: 3,218.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.07 : 4,030.57 = 2,145.80 : x
  2. Step 2: Convert to fraction form
    2,687.07/4,030.57 = 2,145.80/x
  3. Step 3: Cross multiply
    2,687.07x = 4,030.57 × 2,145.80
  4. Step 4: Simplify right side
    2,687.07x = 8,648,797.11
  5. Step 5: Solve for x
    x = 8,648,797.11/2,687.07
  6. Step 6: Final answer
    x = 3,218.67

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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.