Home / 6,138.89-9,208.36-1,979.21

Finding the Fourth Proportional to 6,138.89, 9,208.36 and 1,979.21

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Solution

The fourth proportional to 6,138.89, 9,208.36 and 1,979.21 is: 2,968.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138.89 : 9,208.36 = 1,979.21 : x
  2. Step 2: Convert to fraction form
    6,138.89/9,208.36 = 1,979.21/x
  3. Step 3: Cross multiply
    6,138.89x = 9,208.36 × 1,979.21
  4. Step 4: Simplify right side
    6,138.89x = 18,225,222.26
  5. Step 5: Solve for x
    x = 18,225,222.26/6,138.89
  6. Step 6: Final answer
    x = 2,968.81

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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.