Home / 11,920.78-16,450.86-6,615.82

Finding the Fourth Proportional to 11,920.78, 16,450.86 and 6,615.82

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Solution

The fourth proportional to 11,920.78, 16,450.86 and 6,615.82 is: 9,129.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.78 : 16,450.86 = 6,615.82 : x
  2. Step 2: Convert to fraction form
    11,920.78/16,450.86 = 6,615.82/x
  3. Step 3: Cross multiply
    11,920.78x = 16,450.86 × 6,615.82
  4. Step 4: Simplify right side
    11,920.78x = 108,835,928.61
  5. Step 5: Solve for x
    x = 108,835,928.61/11,920.78
  6. Step 6: Final answer
    x = 9,129.93

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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.