Home / 5,718.08-7,890.87-3,131.03

Finding the Fourth Proportional to 5,718.08, 7,890.87 and 3,131.03

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Solution

The fourth proportional to 5,718.08, 7,890.87 and 3,131.03 is: 4,320.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,718.08 : 7,890.87 = 3,131.03 : x
  2. Step 2: Convert to fraction form
    5,718.08/7,890.87 = 3,131.03/x
  3. Step 3: Cross multiply
    5,718.08x = 7,890.87 × 3,131.03
  4. Step 4: Simplify right side
    5,718.08x = 24,706,550.70
  5. Step 5: Solve for x
    x = 24,706,550.70/5,718.08
  6. Step 6: Final answer
    x = 4,320.78

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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.