Home / 12,431.87-18,649.16-3,666.78

Finding the Fourth Proportional to 12,431.87, 18,649.16 and 3,666.78

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Solution

The fourth proportional to 12,431.87, 18,649.16 and 3,666.78 is: 5,500.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.87 : 18,649.16 = 3,666.78 : x
  2. Step 2: Convert to fraction form
    12,431.87/18,649.16 = 3,666.78/x
  3. Step 3: Cross multiply
    12,431.87x = 18,649.16 × 3,666.78
  4. Step 4: Simplify right side
    12,431.87x = 68,382,348.57
  5. Step 5: Solve for x
    x = 68,382,348.57/12,431.87
  6. Step 6: Final answer
    x = 5,500.57

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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.