Home / 3,131.09-4,320.38-1,872.66

Finding the Fourth Proportional to 3,131.09, 4,320.38 and 1,872.66

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Solution

The fourth proportional to 3,131.09, 4,320.38 and 1,872.66 is: 2,583.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.09 : 4,320.38 = 1,872.66 : x
  2. Step 2: Convert to fraction form
    3,131.09/4,320.38 = 1,872.66/x
  3. Step 3: Cross multiply
    3,131.09x = 4,320.38 × 1,872.66
  4. Step 4: Simplify right side
    3,131.09x = 8,090,602.81
  5. Step 5: Solve for x
    x = 8,090,602.81/3,131.09
  6. Step 6: Final answer
    x = 2,583.96

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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.