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Finding the Fourth Proportional to 7,922.56, 10,954 and 6,938.40

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Solution

The fourth proportional to 7,922.56, 10,954 and 6,938.40 is: 9,593.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,922.56 : 10,954 = 6,938.40 : x
  2. Step 2: Convert to fraction form
    7,922.56/10,954 = 6,938.40/x
  3. Step 3: Cross multiply
    7,922.56x = 10,954 × 6,938.40
  4. Step 4: Simplify right side
    7,922.56x = 76,003,233.60
  5. Step 5: Solve for x
    x = 76,003,233.60/7,922.56
  6. Step 6: Final answer
    x = 9,593.27

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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.