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Finding the Fourth Proportional to 7,612.71, 11,413.70 and 2,928.79

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Solution

The fourth proportional to 7,612.71, 11,413.70 and 2,928.79 is: 4,391.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,612.71 : 11,413.70 = 2,928.79 : x
  2. Step 2: Convert to fraction form
    7,612.71/11,413.70 = 2,928.79/x
  3. Step 3: Cross multiply
    7,612.71x = 11,413.70 × 2,928.79
  4. Step 4: Simplify right side
    7,612.71x = 33,428,330.42
  5. Step 5: Solve for x
    x = 33,428,330.42/7,612.71
  6. Step 6: Final answer
    x = 4,391.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.