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Finding the Fourth Proportional to 18,503.44, 25,539.48 and 11,425.80

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Solution

The fourth proportional to 18,503.44, 25,539.48 and 11,425.80 is: 15,770.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,503.44 : 25,539.48 = 11,425.80 : x
  2. Step 2: Convert to fraction form
    18,503.44/25,539.48 = 11,425.80/x
  3. Step 3: Cross multiply
    18,503.44x = 25,539.48 × 11,425.80
  4. Step 4: Simplify right side
    18,503.44x = 291,808,990.58
  5. Step 5: Solve for x
    x = 291,808,990.58/18,503.44
  6. Step 6: Final answer
    x = 15,770.53

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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.