Home / 11,920.69-16,450.32-6,615.39

Finding the Fourth Proportional to 11,920.69, 16,450.32 and 6,615.39

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Solution

The fourth proportional to 11,920.69, 16,450.32 and 6,615.39 is: 9,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.69 : 16,450.32 = 6,615.39 : x
  2. Step 2: Convert to fraction form
    11,920.69/16,450.32 = 6,615.39/x
  3. Step 3: Cross multiply
    11,920.69x = 16,450.32 × 6,615.39
  4. Step 4: Simplify right side
    11,920.69x = 108,825,282.42
  5. Step 5: Solve for x
    x = 108,825,282.42/11,920.69
  6. Step 6: Final answer
    x = 9,129.11

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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.