Home / 11,679.21-16,116.81-6,642.72

Finding the Fourth Proportional to 11,679.21, 16,116.81 and 6,642.72

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Solution

The fourth proportional to 11,679.21, 16,116.81 and 6,642.72 is: 9,166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,679.21 : 16,116.81 = 6,642.72 : x
  2. Step 2: Convert to fraction form
    11,679.21/16,116.81 = 6,642.72/x
  3. Step 3: Cross multiply
    11,679.21x = 16,116.81 × 6,642.72
  4. Step 4: Simplify right side
    11,679.21x = 107,059,431.21
  5. Step 5: Solve for x
    x = 107,059,431.21/11,679.21
  6. Step 6: Final answer
    x = 9,166.67

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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.