Home / 11,920.99-16,450.81-6,615.69

Finding the Fourth Proportional to 11,920.99, 16,450.81 and 6,615.69

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Solution

The fourth proportional to 11,920.99, 16,450.81 and 6,615.69 is: 9,129.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.99 : 16,450.81 = 6,615.69 : x
  2. Step 2: Convert to fraction form
    11,920.99/16,450.81 = 6,615.69/x
  3. Step 3: Cross multiply
    11,920.99x = 16,450.81 × 6,615.69
  4. Step 4: Simplify right side
    11,920.99x = 108,833,343.88
  5. Step 5: Solve for x
    x = 108,833,343.88/11,920.99
  6. Step 6: Final answer
    x = 9,129.56

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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.