Home / 11,100.93-15,321.60-6,387.81

Finding the Fourth Proportional to 11,100.93, 15,321.60 and 6,387.81

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Solution

The fourth proportional to 11,100.93, 15,321.60 and 6,387.81 is: 8,816.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,100.93 : 15,321.60 = 6,387.81 : x
  2. Step 2: Convert to fraction form
    11,100.93/15,321.60 = 6,387.81/x
  3. Step 3: Cross multiply
    11,100.93x = 15,321.60 × 6,387.81
  4. Step 4: Simplify right side
    11,100.93x = 97,871,469.70
  5. Step 5: Solve for x
    x = 97,871,469.70/11,100.93
  6. Step 6: Final answer
    x = 8,816.51

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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.