Home / 21,745.36-30,009.30-12,313.72

Finding the Fourth Proportional to 21,745.36, 30,009.30 and 12,313.72

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Solution

The fourth proportional to 21,745.36, 30,009.30 and 12,313.72 is: 16,993.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,745.36 : 30,009.30 = 12,313.72 : x
  2. Step 2: Convert to fraction form
    21,745.36/30,009.30 = 12,313.72/x
  3. Step 3: Cross multiply
    21,745.36x = 30,009.30 × 12,313.72
  4. Step 4: Simplify right side
    21,745.36x = 369,526,117.60
  5. Step 5: Solve for x
    x = 369,526,117.60/21,745.36
  6. Step 6: Final answer
    x = 16,993.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.