Home / 12,405.25-17,120.33-6,817.33

Finding the Fourth Proportional to 12,405.25, 17,120.33 and 6,817.33

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Solution

The fourth proportional to 12,405.25, 17,120.33 and 6,817.33 is: 9,408.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.25 : 17,120.33 = 6,817.33 : x
  2. Step 2: Convert to fraction form
    12,405.25/17,120.33 = 6,817.33/x
  3. Step 3: Cross multiply
    12,405.25x = 17,120.33 × 6,817.33
  4. Step 4: Simplify right side
    12,405.25x = 116,714,939.32
  5. Step 5: Solve for x
    x = 116,714,939.32/12,405.25
  6. Step 6: Final answer
    x = 9,408.51

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Half scale
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Double scale
Find fourth proportional to 12,406.25, 17,121.71 and 6,818.33
Similar ratio
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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.