Home / 13,236.21-18,266.81-7,647.21

Finding the Fourth Proportional to 13,236.21, 18,266.81 and 7,647.21

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Solution

The fourth proportional to 13,236.21, 18,266.81 and 7,647.21 is: 10,553.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,236.21 : 18,266.81 = 7,647.21 : x
  2. Step 2: Convert to fraction form
    13,236.21/18,266.81 = 7,647.21/x
  3. Step 3: Cross multiply
    13,236.21x = 18,266.81 × 7,647.21
  4. Step 4: Simplify right side
    13,236.21x = 139,690,093.86
  5. Step 5: Solve for x
    x = 139,690,093.86/13,236.21
  6. Step 6: Final answer
    x = 10,553.63

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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.