Home / 7,120.36-9,825.37-4,136.83

Finding the Fourth Proportional to 7,120.36, 9,825.37 and 4,136.83

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Solution

The fourth proportional to 7,120.36, 9,825.37 and 4,136.83 is: 5,708.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.36 : 9,825.37 = 4,136.83 : x
  2. Step 2: Convert to fraction form
    7,120.36/9,825.37 = 4,136.83/x
  3. Step 3: Cross multiply
    7,120.36x = 9,825.37 × 4,136.83
  4. Step 4: Simplify right side
    7,120.36x = 40,645,885.38
  5. Step 5: Solve for x
    x = 40,645,885.38/7,120.36
  6. Step 6: Final answer
    x = 5,708.40

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Half scale
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Double scale
Find fourth proportional to 7,121.36, 9,826.75 and 4,137.83
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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.