Home / 12,128.40-16,736.22-6,822.90

Finding the Fourth Proportional to 12,128.40, 16,736.22 and 6,822.90

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Solution

The fourth proportional to 12,128.40, 16,736.22 and 6,822.90 is: 9,415.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.40 : 16,736.22 = 6,822.90 : x
  2. Step 2: Convert to fraction form
    12,128.40/16,736.22 = 6,822.90/x
  3. Step 3: Cross multiply
    12,128.40x = 16,736.22 × 6,822.90
  4. Step 4: Simplify right side
    12,128.40x = 114,189,555.44
  5. Step 5: Solve for x
    x = 114,189,555.44/12,128.40
  6. Step 6: Final answer
    x = 9,415.06

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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.