Home / 12,629.80-18,944.70-6,992.20

Finding the Fourth Proportional to 12,629.80, 18,944.70 and 6,992.20

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Solution

The fourth proportional to 12,629.80, 18,944.70 and 6,992.20 is: 10,488.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.80 : 18,944.70 = 6,992.20 : x
  2. Step 2: Convert to fraction form
    12,629.80/18,944.70 = 6,992.20/x
  3. Step 3: Cross multiply
    12,629.80x = 18,944.70 × 6,992.20
  4. Step 4: Simplify right side
    12,629.80x = 132,465,131.34
  5. Step 5: Solve for x
    x = 132,465,131.34/12,629.80
  6. Step 6: Final answer
    x = 10,488.30

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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.