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Finding the Fourth Proportional to 7,208.73, 9,947.75 and 4,065.21

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Solution

The fourth proportional to 7,208.73, 9,947.75 and 4,065.21 is: 5,609.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208.73 : 9,947.75 = 4,065.21 : x
  2. Step 2: Convert to fraction form
    7,208.73/9,947.75 = 4,065.21/x
  3. Step 3: Cross multiply
    7,208.73x = 9,947.75 × 4,065.21
  4. Step 4: Simplify right side
    7,208.73x = 40,439,672.45
  5. Step 5: Solve for x
    x = 40,439,672.45/7,208.73
  6. Step 6: Final answer
    x = 5,609.82

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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.