Home / 12,122.19-16,728.52-6,816.89

Finding the Fourth Proportional to 12,122.19, 16,728.52 and 6,816.89

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Solution

The fourth proportional to 12,122.19, 16,728.52 and 6,816.89 is: 9,407.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.19 : 16,728.52 = 6,816.89 : x
  2. Step 2: Convert to fraction form
    12,122.19/16,728.52 = 6,816.89/x
  3. Step 3: Cross multiply
    12,122.19x = 16,728.52 × 6,816.89
  4. Step 4: Simplify right side
    12,122.19x = 114,036,480.70
  5. Step 5: Solve for x
    x = 114,036,480.70/12,122.19
  6. Step 6: Final answer
    x = 9,407.25

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Half scale
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Double scale
Find fourth proportional to 12,123.19, 16,729.90 and 6,817.89
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.