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Finding the Fourth Proportional to 8,435.80, 11,629.74 and 7,021.54

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Solution

The fourth proportional to 8,435.80, 11,629.74 and 7,021.54 is: 9,680.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,435.80 : 11,629.74 = 7,021.54 : x
  2. Step 2: Convert to fraction form
    8,435.80/11,629.74 = 7,021.54/x
  3. Step 3: Cross multiply
    8,435.80x = 11,629.74 × 7,021.54
  4. Step 4: Simplify right side
    8,435.80x = 81,658,684.60
  5. Step 5: Solve for x
    x = 81,658,684.60/8,435.80
  6. Step 6: Final answer
    x = 9,680.02

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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.