Home / 12,128.52-18,192.78-4,336.86

Finding the Fourth Proportional to 12,128.52, 18,192.78 and 4,336.86

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Solution

The fourth proportional to 12,128.52, 18,192.78 and 4,336.86 is: 6,505.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128.52 : 18,192.78 = 4,336.86 : x
  2. Step 2: Convert to fraction form
    12,128.52/18,192.78 = 4,336.86/x
  3. Step 3: Cross multiply
    12,128.52x = 18,192.78 × 4,336.86
  4. Step 4: Simplify right side
    12,128.52x = 78,899,539.87
  5. Step 5: Solve for x
    x = 78,899,539.87/12,128.52
  6. Step 6: Final answer
    x = 6,505.29

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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.