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Finding the Fourth Proportional to 8,638.55, 12,950.11 and 3,372.33

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Solution

The fourth proportional to 8,638.55, 12,950.11 and 3,372.33 is: 5,055.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.55 : 12,950.11 = 3,372.33 : x
  2. Step 2: Convert to fraction form
    8,638.55/12,950.11 = 3,372.33/x
  3. Step 3: Cross multiply
    8,638.55x = 12,950.11 × 3,372.33
  4. Step 4: Simplify right side
    8,638.55x = 43,672,090.12
  5. Step 5: Solve for x
    x = 43,672,090.12/8,638.55
  6. Step 6: Final answer
    x = 5,055.49

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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.