Home / 8,109.54-11,180.93-6,615.94

Finding the Fourth Proportional to 8,109.54, 11,180.93 and 6,615.94

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Solution

The fourth proportional to 8,109.54, 11,180.93 and 6,615.94 is: 9,121.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,109.54 : 11,180.93 = 6,615.94 : x
  2. Step 2: Convert to fraction form
    8,109.54/11,180.93 = 6,615.94/x
  3. Step 3: Cross multiply
    8,109.54x = 11,180.93 × 6,615.94
  4. Step 4: Simplify right side
    8,109.54x = 73,972,362.02
  5. Step 5: Solve for x
    x = 73,972,362.02/8,109.54
  6. Step 6: Final answer
    x = 9,121.65

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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.