Home / 2,431.80-3,639.49-2,021.74

Finding the Fourth Proportional to 2,431.80, 3,639.49 and 2,021.74

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Solution

The fourth proportional to 2,431.80, 3,639.49 and 2,021.74 is: 3,025.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,431.80 : 3,639.49 = 2,021.74 : x
  2. Step 2: Convert to fraction form
    2,431.80/3,639.49 = 2,021.74/x
  3. Step 3: Cross multiply
    2,431.80x = 3,639.49 × 2,021.74
  4. Step 4: Simplify right side
    2,431.80x = 7,358,088.36
  5. Step 5: Solve for x
    x = 7,358,088.36/2,431.80
  6. Step 6: Final answer
    x = 3,025.78

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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.