Home / 3,215.64-4,815.63-2,118.90

Finding the Fourth Proportional to 3,215.64, 4,815.63 and 2,118.90

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Solution

The fourth proportional to 3,215.64, 4,815.63 and 2,118.90 is: 3,173.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.64 : 4,815.63 = 2,118.90 : x
  2. Step 2: Convert to fraction form
    3,215.64/4,815.63 = 2,118.90/x
  3. Step 3: Cross multiply
    3,215.64x = 4,815.63 × 2,118.90
  4. Step 4: Simplify right side
    3,215.64x = 10,203,838.41
  5. Step 5: Solve for x
    x = 10,203,838.41/3,215.64
  6. Step 6: Final answer
    x = 3,173.19

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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.