Home / 3,122.50-4,683.75-1,891.30

Finding the Fourth Proportional to 3,122.50, 4,683.75 and 1,891.30

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Solution

The fourth proportional to 3,122.50, 4,683.75 and 1,891.30 is: 2,836.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.50 : 4,683.75 = 1,891.30 : x
  2. Step 2: Convert to fraction form
    3,122.50/4,683.75 = 1,891.30/x
  3. Step 3: Cross multiply
    3,122.50x = 4,683.75 × 1,891.30
  4. Step 4: Simplify right side
    3,122.50x = 8,858,376.38
  5. Step 5: Solve for x
    x = 8,858,376.38/3,122.50
  6. Step 6: Final answer
    x = 2,836.95

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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.