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Finding the Fourth Proportional to 7,099.60, 9,797.80 and 3,955.76

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Solution

The fourth proportional to 7,099.60, 9,797.80 and 3,955.76 is: 5,459.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,099.60 : 9,797.80 = 3,955.76 : x
  2. Step 2: Convert to fraction form
    7,099.60/9,797.80 = 3,955.76/x
  3. Step 3: Cross multiply
    7,099.60x = 9,797.80 × 3,955.76
  4. Step 4: Simplify right side
    7,099.60x = 38,757,745.33
  5. Step 5: Solve for x
    x = 38,757,745.33/7,099.60
  6. Step 6: Final answer
    x = 5,459.14

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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.