Home / 3,386.37-4,673.79-1,989.12

Finding the Fourth Proportional to 3,386.37, 4,673.79 and 1,989.12

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Solution

The fourth proportional to 3,386.37, 4,673.79 and 1,989.12 is: 2,745.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.37 : 4,673.79 = 1,989.12 : x
  2. Step 2: Convert to fraction form
    3,386.37/4,673.79 = 1,989.12/x
  3. Step 3: Cross multiply
    3,386.37x = 4,673.79 × 1,989.12
  4. Step 4: Simplify right side
    3,386.37x = 9,296,729.16
  5. Step 5: Solve for x
    x = 9,296,729.16/3,386.37
  6. Step 6: Final answer
    x = 2,745.34

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Half scale
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Double 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.