Home / 6,138.45-9,209.70-1,979.10

Finding the Fourth Proportional to 6,138.45, 9,209.70 and 1,979.10

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Solution

The fourth proportional to 6,138.45, 9,209.70 and 1,979.10 is: 2,969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,138.45 : 9,209.70 = 1,979.10 : x
  2. Step 2: Convert to fraction form
    6,138.45/9,209.70 = 1,979.10/x
  3. Step 3: Cross multiply
    6,138.45x = 9,209.70 × 1,979.10
  4. Step 4: Simplify right side
    6,138.45x = 18,226,917.27
  5. Step 5: Solve for x
    x = 18,226,917.27/6,138.45
  6. Step 6: Final answer
    x = 2,969.30

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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.