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Finding the Fourth Proportional to 30,110.40, 45,170.40 and 12,571.20

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Solution

The fourth proportional to 30,110.40, 45,170.40 and 12,571.20 is: 18,858.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,110.40 : 45,170.40 = 12,571.20 : x
  2. Step 2: Convert to fraction form
    30,110.40/45,170.40 = 12,571.20/x
  3. Step 3: Cross multiply
    30,110.40x = 45,170.40 × 12,571.20
  4. Step 4: Simplify right side
    30,110.40x = 567,846,132.48
  5. Step 5: Solve for x
    x = 567,846,132.48/30,110.40
  6. Step 6: Final answer
    x = 18,858.80

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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.