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Finding the Fourth Proportional to 10,379.88, 14,319 and 6,394.68

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Solution

The fourth proportional to 10,379.88, 14,319 and 6,394.68 is: 8,821.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,379.88 : 14,319 = 6,394.68 : x
  2. Step 2: Convert to fraction form
    10,379.88/14,319 = 6,394.68/x
  3. Step 3: Cross multiply
    10,379.88x = 14,319 × 6,394.68
  4. Step 4: Simplify right side
    10,379.88x = 91,565,422.92
  5. Step 5: Solve for x
    x = 91,565,422.92/10,379.88
  6. Step 6: Final answer
    x = 8,821.43

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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.