Home / 12,121.36-16,727.88-6,817.20

Finding the Fourth Proportional to 12,121.36, 16,727.88 and 6,817.20

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Solution

The fourth proportional to 12,121.36, 16,727.88 and 6,817.20 is: 9,407.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.36 : 16,727.88 = 6,817.20 : x
  2. Step 2: Convert to fraction form
    12,121.36/16,727.88 = 6,817.20/x
  3. Step 3: Cross multiply
    12,121.36x = 16,727.88 × 6,817.20
  4. Step 4: Simplify right side
    12,121.36x = 114,037,303.54
  5. Step 5: Solve for x
    x = 114,037,303.54/12,121.36
  6. Step 6: Final answer
    x = 9,407.96

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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.