Home / 7,890.78-11,836.47-2,626.26

Finding the Fourth Proportional to 7,890.78, 11,836.47 and 2,626.26

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Solution

The fourth proportional to 7,890.78, 11,836.47 and 2,626.26 is: 3,939.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,890.78 : 11,836.47 = 2,626.26 : x
  2. Step 2: Convert to fraction form
    7,890.78/11,836.47 = 2,626.26/x
  3. Step 3: Cross multiply
    7,890.78x = 11,836.47 × 2,626.26
  4. Step 4: Simplify right side
    7,890.78x = 31,085,647.70
  5. Step 5: Solve for x
    x = 31,085,647.70/7,890.78
  6. Step 6: Final answer
    x = 3,939.49

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.