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Finding the Fourth Proportional to 43,503.50, 65,255.25 and 18,879.50

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Solution

The fourth proportional to 43,503.50, 65,255.25 and 18,879.50 is: 28,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,503.50 : 65,255.25 = 18,879.50 : x
  2. Step 2: Convert to fraction form
    43,503.50/65,255.25 = 18,879.50/x
  3. Step 3: Cross multiply
    43,503.50x = 65,255.25 × 18,879.50
  4. Step 4: Simplify right side
    43,503.50x = 1,231,986,492.38
  5. Step 5: Solve for x
    x = 1,231,986,492.38/43,503.50
  6. Step 6: Final answer
    x = 28,319.25

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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.