Home / 3,131.34-4,320.95-1,872.15

Finding the Fourth Proportional to 3,131.34, 4,320.95 and 1,872.15

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Solution

The fourth proportional to 3,131.34, 4,320.95 and 1,872.15 is: 2,583.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.34 : 4,320.95 = 1,872.15 : x
  2. Step 2: Convert to fraction form
    3,131.34/4,320.95 = 1,872.15/x
  3. Step 3: Cross multiply
    3,131.34x = 4,320.95 × 1,872.15
  4. Step 4: Simplify right side
    3,131.34x = 8,089,466.54
  5. Step 5: Solve for x
    x = 8,089,466.54/3,131.34
  6. Step 6: Final answer
    x = 2,583.39

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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.