Home / 4,085.91-6,128.51-1,311.84

Finding the Fourth Proportional to 4,085.91, 6,128.51 and 1,311.84

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Solution

The fourth proportional to 4,085.91, 6,128.51 and 1,311.84 is: 1,967.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,085.91 : 6,128.51 = 1,311.84 : x
  2. Step 2: Convert to fraction form
    4,085.91/6,128.51 = 1,311.84/x
  3. Step 3: Cross multiply
    4,085.91x = 6,128.51 × 1,311.84
  4. Step 4: Simplify right side
    4,085.91x = 8,039,618.00
  5. Step 5: Solve for x
    x = 8,039,618.00/4,085.91
  6. Step 6: Final answer
    x = 1,967.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.