Home / 9,286.32-13,920.84-3,128.88

Finding the Fourth Proportional to 9,286.32, 13,920.84 and 3,128.88

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Solution

The fourth proportional to 9,286.32, 13,920.84 and 3,128.88 is: 4,690.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,286.32 : 13,920.84 = 3,128.88 : x
  2. Step 2: Convert to fraction form
    9,286.32/13,920.84 = 3,128.88/x
  3. Step 3: Cross multiply
    9,286.32x = 13,920.84 × 3,128.88
  4. Step 4: Simplify right side
    9,286.32x = 43,556,637.86
  5. Step 5: Solve for x
    x = 43,556,637.86/9,286.32
  6. Step 6: Final answer
    x = 4,690.41

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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.