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Finding the Fourth Proportional to 13,173.21, 18,179.01 and 7,871.13

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Solution

The fourth proportional to 13,173.21, 18,179.01 and 7,871.13 is: 10,862.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,173.21 : 18,179.01 = 7,871.13 : x
  2. Step 2: Convert to fraction form
    13,173.21/18,179.01 = 7,871.13/x
  3. Step 3: Cross multiply
    13,173.21x = 18,179.01 × 7,871.13
  4. Step 4: Simplify right side
    13,173.21x = 143,089,350.98
  5. Step 5: Solve for x
    x = 143,089,350.98/13,173.21
  6. Step 6: Final answer
    x = 10,862.15

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Double scale
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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.