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Finding the Fourth Proportional to 7,611.90, 10,506.42 and 4,629.78

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Solution

The fourth proportional to 7,611.90, 10,506.42 and 4,629.78 is: 6,390.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,611.90 : 10,506.42 = 4,629.78 : x
  2. Step 2: Convert to fraction form
    7,611.90/10,506.42 = 4,629.78/x
  3. Step 3: Cross multiply
    7,611.90x = 10,506.42 × 4,629.78
  4. Step 4: Simplify right side
    7,611.90x = 48,642,413.19
  5. Step 5: Solve for x
    x = 48,642,413.19/7,611.90
  6. Step 6: Final answer
    x = 6,390.31

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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.