Home / 12,555.18-18,834.60-3,790.80

Finding the Fourth Proportional to 12,555.18, 18,834.60 and 3,790.80

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Solution

The fourth proportional to 12,555.18, 18,834.60 and 3,790.80 is: 5,686.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.18 : 18,834.60 = 3,790.80 : x
  2. Step 2: Convert to fraction form
    12,555.18/18,834.60 = 3,790.80/x
  3. Step 3: Cross multiply
    12,555.18x = 18,834.60 × 3,790.80
  4. Step 4: Simplify right side
    12,555.18x = 71,398,201.68
  5. Step 5: Solve for x
    x = 71,398,201.68/12,555.18
  6. Step 6: Final answer
    x = 5,686.75

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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.