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Finding the Fourth Proportional to 14,379.81, 19,839.08 and 8,409.30

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Solution

The fourth proportional to 14,379.81, 19,839.08 and 8,409.30 is: 11,601.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,379.81 : 19,839.08 = 8,409.30 : x
  2. Step 2: Convert to fraction form
    14,379.81/19,839.08 = 8,409.30/x
  3. Step 3: Cross multiply
    14,379.81x = 19,839.08 × 8,409.30
  4. Step 4: Simplify right side
    14,379.81x = 166,832,733.40
  5. Step 5: Solve for x
    x = 166,832,733.40/14,379.81
  6. Step 6: Final answer
    x = 11,601.87

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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.