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Finding the Fourth Proportional to 30,339.90, 41,868.09 and 19,015.50

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Solution

The fourth proportional to 30,339.90, 41,868.09 and 19,015.50 is: 26,240.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,339.90 : 41,868.09 = 19,015.50 : x
  2. Step 2: Convert to fraction form
    30,339.90/41,868.09 = 19,015.50/x
  3. Step 3: Cross multiply
    30,339.90x = 41,868.09 × 19,015.50
  4. Step 4: Simplify right side
    30,339.90x = 796,142,665.40
  5. Step 5: Solve for x
    x = 796,142,665.40/30,339.90
  6. Step 6: Final answer
    x = 26,240.78

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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.