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Finding the Fourth Proportional to 8,636.40, 11,915.16 and 5,097.84

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Solution

The fourth proportional to 8,636.40, 11,915.16 and 5,097.84 is: 7,033.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.40 : 11,915.16 = 5,097.84 : x
  2. Step 2: Convert to fraction form
    8,636.40/11,915.16 = 5,097.84/x
  3. Step 3: Cross multiply
    8,636.40x = 11,915.16 × 5,097.84
  4. Step 4: Simplify right side
    8,636.40x = 60,741,579.25
  5. Step 5: Solve for x
    x = 60,741,579.25/8,636.40
  6. Step 6: Final answer
    x = 7,033.21

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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.