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Finding the Fourth Proportional to 12,000.62, 18,005.60 and 4,978.86

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Solution

The fourth proportional to 12,000.62, 18,005.60 and 4,978.86 is: 7,470.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,000.62 : 18,005.60 = 4,978.86 : x
  2. Step 2: Convert to fraction form
    12,000.62/18,005.60 = 4,978.86/x
  3. Step 3: Cross multiply
    12,000.62x = 18,005.60 × 4,978.86
  4. Step 4: Simplify right side
    12,000.62x = 89,647,336.72
  5. Step 5: Solve for x
    x = 89,647,336.72/12,000.62
  6. Step 6: Final answer
    x = 7,470.23

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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.