Home / 8,690.69-13,037.42-3,143.48

Finding the Fourth Proportional to 8,690.69, 13,037.42 and 3,143.48

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Solution

The fourth proportional to 8,690.69, 13,037.42 and 3,143.48 is: 4,715.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.69 : 13,037.42 = 3,143.48 : x
  2. Step 2: Convert to fraction form
    8,690.69/13,037.42 = 3,143.48/x
  3. Step 3: Cross multiply
    8,690.69x = 13,037.42 × 3,143.48
  4. Step 4: Simplify right side
    8,690.69x = 40,982,811.69
  5. Step 5: Solve for x
    x = 40,982,811.69/8,690.69
  6. Step 6: Final answer
    x = 4,715.71

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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.