Home / 2,912.20-4,018.80-1,585.87

Finding the Fourth Proportional to 2,912.20, 4,018.80 and 1,585.87

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Solution

The fourth proportional to 2,912.20, 4,018.80 and 1,585.87 is: 2,188.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.20 : 4,018.80 = 1,585.87 : x
  2. Step 2: Convert to fraction form
    2,912.20/4,018.80 = 1,585.87/x
  3. Step 3: Cross multiply
    2,912.20x = 4,018.80 × 1,585.87
  4. Step 4: Simplify right side
    2,912.20x = 6,373,294.36
  5. Step 5: Solve for x
    x = 6,373,294.36/2,912.20
  6. Step 6: Final answer
    x = 2,188.48

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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.