Home / 6,311.95-8,718.71-5,121.36

Finding the Fourth Proportional to 6,311.95, 8,718.71 and 5,121.36

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Solution

The fourth proportional to 6,311.95, 8,718.71 and 5,121.36 is: 7,074.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,311.95 : 8,718.71 = 5,121.36 : x
  2. Step 2: Convert to fraction form
    6,311.95/8,718.71 = 5,121.36/x
  3. Step 3: Cross multiply
    6,311.95x = 8,718.71 × 5,121.36
  4. Step 4: Simplify right side
    6,311.95x = 44,651,652.65
  5. Step 5: Solve for x
    x = 44,651,652.65/6,311.95
  6. Step 6: Final answer
    x = 7,074.15

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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.