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Finding the Fourth Proportional to 7,065.92, 9,751.56 and 3,922.40

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Solution

The fourth proportional to 7,065.92, 9,751.56 and 3,922.40 is: 5,413.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,065.92 : 9,751.56 = 3,922.40 : x
  2. Step 2: Convert to fraction form
    7,065.92/9,751.56 = 3,922.40/x
  3. Step 3: Cross multiply
    7,065.92x = 9,751.56 × 3,922.40
  4. Step 4: Simplify right side
    7,065.92x = 38,249,518.94
  5. Step 5: Solve for x
    x = 38,249,518.94/7,065.92
  6. Step 6: Final answer
    x = 5,413.24

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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.