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Finding the Fourth Proportional to 12,615.78, 18,927.78 and 3,850.68

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Solution

The fourth proportional to 12,615.78, 18,927.78 and 3,850.68 is: 5,777.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,615.78 : 18,927.78 = 3,850.68 : x
  2. Step 2: Convert to fraction form
    12,615.78/18,927.78 = 3,850.68/x
  3. Step 3: Cross multiply
    12,615.78x = 18,927.78 × 3,850.68
  4. Step 4: Simplify right side
    12,615.78x = 72,884,823.89
  5. Step 5: Solve for x
    x = 72,884,823.89/12,615.78
  6. Step 6: Final answer
    x = 5,777.27

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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.