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Finding the Fourth Proportional to 12,148.52, 18,222.80 and 3,940.52

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Solution

The fourth proportional to 12,148.52, 18,222.80 and 3,940.52 is: 5,910.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,148.52 : 18,222.80 = 3,940.52 : x
  2. Step 2: Convert to fraction form
    12,148.52/18,222.80 = 3,940.52/x
  3. Step 3: Cross multiply
    12,148.52x = 18,222.80 × 3,940.52
  4. Step 4: Simplify right side
    12,148.52x = 71,807,307.86
  5. Step 5: Solve for x
    x = 71,807,307.86/12,148.52
  6. Step 6: Final answer
    x = 5,910.79

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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.