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Finding the Fourth Proportional to 18,803.60, 25,949.49 and 10,420.10

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Solution

The fourth proportional to 18,803.60, 25,949.49 and 10,420.10 is: 14,380.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.60 : 25,949.49 = 10,420.10 : x
  2. Step 2: Convert to fraction form
    18,803.60/25,949.49 = 10,420.10/x
  3. Step 3: Cross multiply
    18,803.60x = 25,949.49 × 10,420.10
  4. Step 4: Simplify right side
    18,803.60x = 270,396,280.75
  5. Step 5: Solve for x
    x = 270,396,280.75/18,803.60
  6. Step 6: Final answer
    x = 14,380.03

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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.