Home / 6,111.44-8,428.20-5,169.20

Finding the Fourth Proportional to 6,111.44, 8,428.20 and 5,169.20

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Solution

The fourth proportional to 6,111.44, 8,428.20 and 5,169.20 is: 7,128.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,111.44 : 8,428.20 = 5,169.20 : x
  2. Step 2: Convert to fraction form
    6,111.44/8,428.20 = 5,169.20/x
  3. Step 3: Cross multiply
    6,111.44x = 8,428.20 × 5,169.20
  4. Step 4: Simplify right side
    6,111.44x = 43,567,051.44
  5. Step 5: Solve for x
    x = 43,567,051.44/6,111.44
  6. Step 6: Final answer
    x = 7,128.77

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Half scale
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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.