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Finding the Fourth Proportional to 8,638.86, 11,940.03 and 7,615.02

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Solution

The fourth proportional to 8,638.86, 11,940.03 and 7,615.02 is: 10,524.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.86 : 11,940.03 = 7,615.02 : x
  2. Step 2: Convert to fraction form
    8,638.86/11,940.03 = 7,615.02/x
  3. Step 3: Cross multiply
    8,638.86x = 11,940.03 × 7,615.02
  4. Step 4: Simplify right side
    8,638.86x = 90,923,567.25
  5. Step 5: Solve for x
    x = 90,923,567.25/8,638.86
  6. Step 6: Final answer
    x = 10,524.95

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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.