Home / 2,912.90-4,019.80-1,586.60

Finding the Fourth Proportional to 2,912.90, 4,019.80 and 1,586.60

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Solution

The fourth proportional to 2,912.90, 4,019.80 and 1,586.60 is: 2,189.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.90 : 4,019.80 = 1,586.60 : x
  2. Step 2: Convert to fraction form
    2,912.90/4,019.80 = 1,586.60/x
  3. Step 3: Cross multiply
    2,912.90x = 4,019.80 × 1,586.60
  4. Step 4: Simplify right side
    2,912.90x = 6,377,790.61
  5. Step 5: Solve for x
    x = 6,377,790.61/2,912.90
  6. Step 6: Final answer
    x = 2,189.50

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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.