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Finding the Fourth Proportional to 12,200.90, 18,301.35 and 10,300.10

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Solution

The fourth proportional to 12,200.90, 18,301.35 and 10,300.10 is: 15,450.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.90 : 18,301.35 = 10,300.10 : x
  2. Step 2: Convert to fraction form
    12,200.90/18,301.35 = 10,300.10/x
  3. Step 3: Cross multiply
    12,200.90x = 18,301.35 × 10,300.10
  4. Step 4: Simplify right side
    12,200.90x = 188,505,735.14
  5. Step 5: Solve for x
    x = 188,505,735.14/12,200.90
  6. Step 6: Final answer
    x = 15,450.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.