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Finding the Fourth Proportional to 30,368.09, 41,890.41 and 18,260.15

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Solution

The fourth proportional to 30,368.09, 41,890.41 and 18,260.15 is: 25,188.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,368.09 : 41,890.41 = 18,260.15 : x
  2. Step 2: Convert to fraction form
    30,368.09/41,890.41 = 18,260.15/x
  3. Step 3: Cross multiply
    30,368.09x = 41,890.41 × 18,260.15
  4. Step 4: Simplify right side
    30,368.09x = 764,924,960.71
  5. Step 5: Solve for x
    x = 764,924,960.71/30,368.09
  6. Step 6: Final answer
    x = 25,188.44

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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.