Home / 4,321.12-6,480.88-2,128.48

Finding the Fourth Proportional to 4,321.12, 6,480.88 and 2,128.48

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Solution

The fourth proportional to 4,321.12, 6,480.88 and 2,128.48 is: 3,192.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,321.12 : 6,480.88 = 2,128.48 : x
  2. Step 2: Convert to fraction form
    4,321.12/6,480.88 = 2,128.48/x
  3. Step 3: Cross multiply
    4,321.12x = 6,480.88 × 2,128.48
  4. Step 4: Simplify right side
    4,321.12x = 13,794,423.46
  5. Step 5: Solve for x
    x = 13,794,423.46/4,321.12
  6. Step 6: Final answer
    x = 3,192.33

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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.