Home / 30,331.60-45,481.20-12,781.60

Finding the Fourth Proportional to 30,331.60, 45,481.20 and 12,781.60

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Solution

The fourth proportional to 30,331.60, 45,481.20 and 12,781.60 is: 19,165.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331.60 : 45,481.20 = 12,781.60 : x
  2. Step 2: Convert to fraction form
    30,331.60/45,481.20 = 12,781.60/x
  3. Step 3: Cross multiply
    30,331.60x = 45,481.20 × 12,781.60
  4. Step 4: Simplify right side
    30,331.60x = 581,322,505.92
  5. Step 5: Solve for x
    x = 581,322,505.92/30,331.60
  6. Step 6: Final answer
    x = 19,165.57

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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.