Home / 8,185.76-11,290.56-7,188.92

Finding the Fourth Proportional to 8,185.76, 11,290.56 and 7,188.92

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Solution

The fourth proportional to 8,185.76, 11,290.56 and 7,188.92 is: 9,915.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,185.76 : 11,290.56 = 7,188.92 : x
  2. Step 2: Convert to fraction form
    8,185.76/11,290.56 = 7,188.92/x
  3. Step 3: Cross multiply
    8,185.76x = 11,290.56 × 7,188.92
  4. Step 4: Simplify right side
    8,185.76x = 81,166,932.60
  5. Step 5: Solve for x
    x = 81,166,932.60/8,185.76
  6. Step 6: Final answer
    x = 9,915.63

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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.