Home / 12,620.25-18,930.74-3,386.25

Finding the Fourth Proportional to 12,620.25, 18,930.74 and 3,386.25

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Solution

The fourth proportional to 12,620.25, 18,930.74 and 3,386.25 is: 5,079.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,620.25 : 18,930.74 = 3,386.25 : x
  2. Step 2: Convert to fraction form
    12,620.25/18,930.74 = 3,386.25/x
  3. Step 3: Cross multiply
    12,620.25x = 18,930.74 × 3,386.25
  4. Step 4: Simplify right side
    12,620.25x = 64,104,201.39
  5. Step 5: Solve for x
    x = 64,104,201.39/12,620.25
  6. Step 6: Final answer
    x = 5,079.47

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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.