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Finding the Fourth Proportional to 7,193.80, 9,915.78 and 7,096.60

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Solution

The fourth proportional to 7,193.80, 9,915.78 and 7,096.60 is: 9,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,193.80 : 9,915.78 = 7,096.60 : x
  2. Step 2: Convert to fraction form
    7,193.80/9,915.78 = 7,096.60/x
  3. Step 3: Cross multiply
    7,193.80x = 9,915.78 × 7,096.60
  4. Step 4: Simplify right side
    7,193.80x = 70,368,324.35
  5. Step 5: Solve for x
    x = 70,368,324.35/7,193.80
  6. Step 6: Final answer
    x = 9,781.80

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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.