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Finding the Fourth Proportional to 13,203, 18,220.14 and 7,617.24

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Solution

The fourth proportional to 13,203, 18,220.14 and 7,617.24 is: 10,511.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,203 : 18,220.14 = 7,617.24 : x
  2. Step 2: Convert to fraction form
    13,203/18,220.14 = 7,617.24/x
  3. Step 3: Cross multiply
    13,203x = 18,220.14 × 7,617.24
  4. Step 4: Simplify right side
    13,203x = 138,787,179.21
  5. Step 5: Solve for x
    x = 138,787,179.21/13,203
  6. Step 6: Final answer
    x = 10,511.79

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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.