Home / 3,131.36-4,320.96-1,872.16

Finding the Fourth Proportional to 3,131.36, 4,320.96 and 1,872.16

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Solution

The fourth proportional to 3,131.36, 4,320.96 and 1,872.16 is: 2,583.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.36 : 4,320.96 = 1,872.16 : x
  2. Step 2: Convert to fraction form
    3,131.36/4,320.96 = 1,872.16/x
  3. Step 3: Cross multiply
    3,131.36x = 4,320.96 × 1,872.16
  4. Step 4: Simplify right side
    3,131.36x = 8,089,545.49
  5. Step 5: Solve for x
    x = 8,089,545.49/3,131.36
  6. Step 6: Final answer
    x = 2,583.40

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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.