Home / 12,745.09-19,117.64-3,980.69

Finding the Fourth Proportional to 12,745.09, 19,117.64 and 3,980.69

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Solution

The fourth proportional to 12,745.09, 19,117.64 and 3,980.69 is: 5,971.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,745.09 : 19,117.64 = 3,980.69 : x
  2. Step 2: Convert to fraction form
    12,745.09/19,117.64 = 3,980.69/x
  3. Step 3: Cross multiply
    12,745.09x = 19,117.64 × 3,980.69
  4. Step 4: Simplify right side
    12,745.09x = 76,101,398.37
  5. Step 5: Solve for x
    x = 76,101,398.37/12,745.09
  6. Step 6: Final answer
    x = 5,971.04

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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.