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Finding the Fourth Proportional to 11,163.84, 15,405.22 and 6,128.04

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Solution

The fourth proportional to 11,163.84, 15,405.22 and 6,128.04 is: 8,456.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.84 : 15,405.22 = 6,128.04 : x
  2. Step 2: Convert to fraction form
    11,163.84/15,405.22 = 6,128.04/x
  3. Step 3: Cross multiply
    11,163.84x = 15,405.22 × 6,128.04
  4. Step 4: Simplify right side
    11,163.84x = 94,403,804.37
  5. Step 5: Solve for x
    x = 94,403,804.37/11,163.84
  6. Step 6: Final answer
    x = 8,456.21

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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.