Home / 12,899.40-19,336.86-4,129.80

Finding the Fourth Proportional to 12,899.40, 19,336.86 and 4,129.80

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Solution

The fourth proportional to 12,899.40, 19,336.86 and 4,129.80 is: 6,190.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,899.40 : 19,336.86 = 4,129.80 : x
  2. Step 2: Convert to fraction form
    12,899.40/19,336.86 = 4,129.80/x
  3. Step 3: Cross multiply
    12,899.40x = 19,336.86 × 4,129.80
  4. Step 4: Simplify right side
    12,899.40x = 79,857,364.43
  5. Step 5: Solve for x
    x = 79,857,364.43/12,899.40
  6. Step 6: Final answer
    x = 6,190.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.