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Finding the Fourth Proportional to 13,173.63, 18,179.88 and 7,205.68

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Solution

The fourth proportional to 13,173.63, 18,179.88 and 7,205.68 is: 9,943.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.63 : 18,179.88 = 7,205.68 : x
  2. Step 2: Convert to fraction form
    13,173.63/18,179.88 = 7,205.68/x
  3. Step 3: Cross multiply
    13,173.63x = 18,179.88 × 7,205.68
  4. Step 4: Simplify right side
    13,173.63x = 130,998,397.72
  5. Step 5: Solve for x
    x = 130,998,397.72/13,173.63
  6. Step 6: Final answer
    x = 9,943.99

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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.