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Finding the Fourth Proportional to 30,393.70, 41,942.21 and 19,069.30

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Solution

The fourth proportional to 30,393.70, 41,942.21 and 19,069.30 is: 26,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,393.70 : 41,942.21 = 19,069.30 : x
  2. Step 2: Convert to fraction form
    30,393.70/41,942.21 = 19,069.30/x
  3. Step 3: Cross multiply
    30,393.70x = 41,942.21 × 19,069.30
  4. Step 4: Simplify right side
    30,393.70x = 799,808,585.15
  5. Step 5: Solve for x
    x = 799,808,585.15/30,393.70
  6. Step 6: Final answer
    x = 26,314.95

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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.