Home / 3,118.20-4,671.63-1,815.72

Finding the Fourth Proportional to 3,118.20, 4,671.63 and 1,815.72

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Solution

The fourth proportional to 3,118.20, 4,671.63 and 1,815.72 is: 2,720.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.20 : 4,671.63 = 1,815.72 : x
  2. Step 2: Convert to fraction form
    3,118.20/4,671.63 = 1,815.72/x
  3. Step 3: Cross multiply
    3,118.20x = 4,671.63 × 1,815.72
  4. Step 4: Simplify right side
    3,118.20x = 8,482,372.02
  5. Step 5: Solve for x
    x = 8,482,372.02/3,118.20
  6. Step 6: Final answer
    x = 2,720.28

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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.