Home / 6,138.39-9,207.36-1,978.62

Finding the Fourth Proportional to 6,138.39, 9,207.36 and 1,978.62

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Solution

The fourth proportional to 6,138.39, 9,207.36 and 1,978.62 is: 2,967.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138.39 : 9,207.36 = 1,978.62 : x
  2. Step 2: Convert to fraction form
    6,138.39/9,207.36 = 1,978.62/x
  3. Step 3: Cross multiply
    6,138.39x = 9,207.36 × 1,978.62
  4. Step 4: Simplify right side
    6,138.39x = 18,217,866.64
  5. Step 5: Solve for x
    x = 18,217,866.64/6,138.39
  6. Step 6: Final answer
    x = 2,967.86

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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.