Home / 11,921.22-16,450.78-6,615.72

Finding the Fourth Proportional to 11,921.22, 16,450.78 and 6,615.72

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Solution

The fourth proportional to 11,921.22, 16,450.78 and 6,615.72 is: 9,129.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.22 : 16,450.78 = 6,615.72 : x
  2. Step 2: Convert to fraction form
    11,921.22/16,450.78 = 6,615.72/x
  3. Step 3: Cross multiply
    11,921.22x = 16,450.78 × 6,615.72
  4. Step 4: Simplify right side
    11,921.22x = 108,833,754.26
  5. Step 5: Solve for x
    x = 108,833,754.26/11,921.22
  6. Step 6: Final answer
    x = 9,129.41

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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.