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Finding the Fourth Proportional to 18,338.99, 25,303.61 and 10,379.48

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Solution

The fourth proportional to 18,338.99, 25,303.61 and 10,379.48 is: 14,321.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,338.99 : 25,303.61 = 10,379.48 : x
  2. Step 2: Convert to fraction form
    18,338.99/25,303.61 = 10,379.48/x
  3. Step 3: Cross multiply
    18,338.99x = 25,303.61 × 10,379.48
  4. Step 4: Simplify right side
    18,338.99x = 262,638,262.03
  5. Step 5: Solve for x
    x = 262,638,262.03/18,338.99
  6. Step 6: Final answer
    x = 14,321.30

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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.