Home / 12,591.44-17,379.85-8,399.68

Finding the Fourth Proportional to 12,591.44, 17,379.85 and 8,399.68

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Solution

The fourth proportional to 12,591.44, 17,379.85 and 8,399.68 is: 11,594.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.44 : 17,379.85 = 8,399.68 : x
  2. Step 2: Convert to fraction form
    12,591.44/17,379.85 = 8,399.68/x
  3. Step 3: Cross multiply
    12,591.44x = 17,379.85 × 8,399.68
  4. Step 4: Simplify right side
    12,591.44x = 145,985,178.45
  5. Step 5: Solve for x
    x = 145,985,178.45/12,591.44
  6. Step 6: Final answer
    x = 11,594.00

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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.