Home / 12,690.27-19,037.43-6,447.70

Finding the Fourth Proportional to 12,690.27, 19,037.43 and 6,447.70

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Solution

The fourth proportional to 12,690.27, 19,037.43 and 6,447.70 is: 9,672.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,690.27 : 19,037.43 = 6,447.70 : x
  2. Step 2: Convert to fraction form
    12,690.27/19,037.43 = 6,447.70/x
  3. Step 3: Cross multiply
    12,690.27x = 19,037.43 × 6,447.70
  4. Step 4: Simplify right side
    12,690.27x = 122,747,661.21
  5. Step 5: Solve for x
    x = 122,747,661.21/12,690.27
  6. Step 6: Final answer
    x = 9,672.58

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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.