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Finding the Fourth Proportional to 7,099.70, 9,797.76 and 3,955.95

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Solution

The fourth proportional to 7,099.70, 9,797.76 and 3,955.95 is: 5,459.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,099.70 : 9,797.76 = 3,955.95 : x
  2. Step 2: Convert to fraction form
    7,099.70/9,797.76 = 3,955.95/x
  3. Step 3: Cross multiply
    7,099.70x = 9,797.76 × 3,955.95
  4. Step 4: Simplify right side
    7,099.70x = 38,759,448.67
  5. Step 5: Solve for x
    x = 38,759,448.67/7,099.70
  6. Step 6: Final answer
    x = 5,459.31

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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.