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Finding the Fourth Proportional to 7,201.94, 9,938.67 and 3,889.94

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Solution

The fourth proportional to 7,201.94, 9,938.67 and 3,889.94 is: 5,368.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,201.94 : 9,938.67 = 3,889.94 : x
  2. Step 2: Convert to fraction form
    7,201.94/9,938.67 = 3,889.94/x
  3. Step 3: Cross multiply
    7,201.94x = 9,938.67 × 3,889.94
  4. Step 4: Simplify right side
    7,201.94x = 38,660,829.98
  5. Step 5: Solve for x
    x = 38,660,829.98/7,201.94
  6. Step 6: Final answer
    x = 5,368.11

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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.