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Finding the Fourth Proportional to 8,672.10, 11,969.05 and 5,137.06

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Solution

The fourth proportional to 8,672.10, 11,969.05 and 5,137.06 is: 7,090.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.10 : 11,969.05 = 5,137.06 : x
  2. Step 2: Convert to fraction form
    8,672.10/11,969.05 = 5,137.06/x
  3. Step 3: Cross multiply
    8,672.10x = 11,969.05 × 5,137.06
  4. Step 4: Simplify right side
    8,672.10x = 61,485,727.99
  5. Step 5: Solve for x
    x = 61,485,727.99/8,672.10
  6. Step 6: Final answer
    x = 7,090.06

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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.