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Finding the Fourth Proportional to 13,141.64, 18,136.99 and 7,321.34

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Solution

The fourth proportional to 13,141.64, 18,136.99 and 7,321.34 is: 10,104.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.64 : 18,136.99 = 7,321.34 : x
  2. Step 2: Convert to fraction form
    13,141.64/18,136.99 = 7,321.34/x
  3. Step 3: Cross multiply
    13,141.64x = 18,136.99 × 7,321.34
  4. Step 4: Simplify right side
    13,141.64x = 132,787,070.37
  5. Step 5: Solve for x
    x = 132,787,070.37/13,141.64
  6. Step 6: Final answer
    x = 10,104.30

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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.