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Finding the Fourth Proportional to 11,153, 15,391.32 and 6,185

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Solution

The fourth proportional to 11,153, 15,391.32 and 6,185 is: 8,535.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,153 : 15,391.32 = 6,185 : x
  2. Step 2: Convert to fraction form
    11,153/15,391.32 = 6,185/x
  3. Step 3: Cross multiply
    11,153x = 15,391.32 × 6,185
  4. Step 4: Simplify right side
    11,153x = 95,195,314.20
  5. Step 5: Solve for x
    x = 95,195,314.20/11,153
  6. Step 6: Final answer
    x = 8,535.40

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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.