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Finding the Fourth Proportional to 30,571.99, 45,874.53 and 12,804.21

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Solution

The fourth proportional to 30,571.99, 45,874.53 and 12,804.21 is: 19,213.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,571.99 : 45,874.53 = 12,804.21 : x
  2. Step 2: Convert to fraction form
    30,571.99/45,874.53 = 12,804.21/x
  3. Step 3: Cross multiply
    30,571.99x = 45,874.53 × 12,804.21
  4. Step 4: Simplify right side
    30,571.99x = 587,387,115.77
  5. Step 5: Solve for x
    x = 587,387,115.77/30,571.99
  6. Step 6: Final answer
    x = 19,213.24

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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.