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Finding the Fourth Proportional to 18,803.36, 25,948.44 and 10,419.80

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Solution

The fourth proportional to 18,803.36, 25,948.44 and 10,419.80 is: 14,379.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,803.36 : 25,948.44 = 10,419.80 : x
  2. Step 2: Convert to fraction form
    18,803.36/25,948.44 = 10,419.80/x
  3. Step 3: Cross multiply
    18,803.36x = 25,948.44 × 10,419.80
  4. Step 4: Simplify right side
    18,803.36x = 270,377,555.11
  5. Step 5: Solve for x
    x = 270,377,555.11/18,803.36
  6. Step 6: Final answer
    x = 14,379.21

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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.