Home / 12,768.44-17,615.60-7,920.92

Finding the Fourth Proportional to 12,768.44, 17,615.60 and 7,920.92

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Solution

The fourth proportional to 12,768.44, 17,615.60 and 7,920.92 is: 10,927.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768.44 : 17,615.60 = 7,920.92 : x
  2. Step 2: Convert to fraction form
    12,768.44/17,615.60 = 7,920.92/x
  3. Step 3: Cross multiply
    12,768.44x = 17,615.60 × 7,920.92
  4. Step 4: Simplify right side
    12,768.44x = 139,531,758.35
  5. Step 5: Solve for x
    x = 139,531,758.35/12,768.44
  6. Step 6: Final answer
    x = 10,927.86

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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.