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Finding the Fourth Proportional to 30,379.87, 41,927.12 and 18,440.47

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Solution

The fourth proportional to 30,379.87, 41,927.12 and 18,440.47 is: 25,449.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.87 : 41,927.12 = 18,440.47 : x
  2. Step 2: Convert to fraction form
    30,379.87/41,927.12 = 18,440.47/x
  3. Step 3: Cross multiply
    30,379.87x = 41,927.12 × 18,440.47
  4. Step 4: Simplify right side
    30,379.87x = 773,155,798.55
  5. Step 5: Solve for x
    x = 773,155,798.55/30,379.87
  6. Step 6: Final answer
    x = 25,449.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.