Home / 12,128.18-16,735.69-6,822.88

Finding the Fourth Proportional to 12,128.18, 16,735.69 and 6,822.88

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Solution

The fourth proportional to 12,128.18, 16,735.69 and 6,822.88 is: 9,414.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.18 : 16,735.69 = 6,822.88 : x
  2. Step 2: Convert to fraction form
    12,128.18/16,735.69 = 6,822.88/x
  3. Step 3: Cross multiply
    12,128.18x = 16,735.69 × 6,822.88
  4. Step 4: Simplify right side
    12,128.18x = 114,185,571.28
  5. Step 5: Solve for x
    x = 114,185,571.28/12,128.18
  6. Step 6: Final answer
    x = 9,414.90

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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.