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Finding the Fourth Proportional to 12,751.52, 19,129.44 and 3,984.71

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Solution

The fourth proportional to 12,751.52, 19,129.44 and 3,984.71 is: 5,977.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,751.52 : 19,129.44 = 3,984.71 : x
  2. Step 2: Convert to fraction form
    12,751.52/19,129.44 = 3,984.71/x
  3. Step 3: Cross multiply
    12,751.52x = 19,129.44 × 3,984.71
  4. Step 4: Simplify right side
    12,751.52x = 76,225,270.86
  5. Step 5: Solve for x
    x = 76,225,270.86/12,751.52
  6. Step 6: Final answer
    x = 5,977.74

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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.