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Finding the Fourth Proportional to 12,687.68, 18,938.26 and 11,796.32

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Solution

The fourth proportional to 12,687.68, 18,938.26 and 11,796.32 is: 17,607.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.68 : 18,938.26 = 11,796.32 : x
  2. Step 2: Convert to fraction form
    12,687.68/18,938.26 = 11,796.32/x
  3. Step 3: Cross multiply
    12,687.68x = 18,938.26 × 11,796.32
  4. Step 4: Simplify right side
    12,687.68x = 223,401,775.20
  5. Step 5: Solve for x
    x = 223,401,775.20/12,687.68
  6. Step 6: Final answer
    x = 17,607.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.