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Finding the Fourth Proportional to 30,321.41, 45,488.41 and 12,791.39

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Solution

The fourth proportional to 30,321.41, 45,488.41 and 12,791.39 is: 19,189.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,321.41 : 45,488.41 = 12,791.39 : x
  2. Step 2: Convert to fraction form
    30,321.41/45,488.41 = 12,791.39/x
  3. Step 3: Cross multiply
    30,321.41x = 45,488.41 × 12,791.39
  4. Step 4: Simplify right side
    30,321.41x = 581,859,733.37
  5. Step 5: Solve for x
    x = 581,859,733.37/30,321.41
  6. Step 6: Final answer
    x = 19,189.74

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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.