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Finding the Fourth Proportional to 12,300.60, 18,450.90 and 5,739.60

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Solution

The fourth proportional to 12,300.60, 18,450.90 and 5,739.60 is: 8,609.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,300.60 : 18,450.90 = 5,739.60 : x
  2. Step 2: Convert to fraction form
    12,300.60/18,450.90 = 5,739.60/x
  3. Step 3: Cross multiply
    12,300.60x = 18,450.90 × 5,739.60
  4. Step 4: Simplify right side
    12,300.60x = 105,900,785.64
  5. Step 5: Solve for x
    x = 105,900,785.64/12,300.60
  6. Step 6: Final answer
    x = 8,609.40

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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.