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Finding the Fourth Proportional to 18,563.55, 25,619.05 and 10,605.60

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Solution

The fourth proportional to 18,563.55, 25,619.05 and 10,605.60 is: 14,636.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,563.55 : 25,619.05 = 10,605.60 : x
  2. Step 2: Convert to fraction form
    18,563.55/25,619.05 = 10,605.60/x
  3. Step 3: Cross multiply
    18,563.55x = 25,619.05 × 10,605.60
  4. Step 4: Simplify right side
    18,563.55x = 271,705,396.68
  5. Step 5: Solve for x
    x = 271,705,396.68/18,563.55
  6. Step 6: Final answer
    x = 14,636.50

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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.