Home / 2,813.68-4,220.75-2,121.67

Finding the Fourth Proportional to 2,813.68, 4,220.75 and 2,121.67

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Solution

The fourth proportional to 2,813.68, 4,220.75 and 2,121.67 is: 3,182.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.68 : 4,220.75 = 2,121.67 : x
  2. Step 2: Convert to fraction form
    2,813.68/4,220.75 = 2,121.67/x
  3. Step 3: Cross multiply
    2,813.68x = 4,220.75 × 2,121.67
  4. Step 4: Simplify right side
    2,813.68x = 8,955,038.65
  5. Step 5: Solve for x
    x = 8,955,038.65/2,813.68
  6. Step 6: Final answer
    x = 3,182.68

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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.