Home / 12,555.16-18,835.79-3,789.55

Finding the Fourth Proportional to 12,555.16, 18,835.79 and 3,789.55

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Solution

The fourth proportional to 12,555.16, 18,835.79 and 3,789.55 is: 5,685.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.16 : 18,835.79 = 3,789.55 : x
  2. Step 2: Convert to fraction form
    12,555.16/18,835.79 = 3,789.55/x
  3. Step 3: Cross multiply
    12,555.16x = 18,835.79 × 3,789.55
  4. Step 4: Simplify right side
    12,555.16x = 71,379,167.99
  5. Step 5: Solve for x
    x = 71,379,167.99/12,555.16
  6. Step 6: Final answer
    x = 5,685.25

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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.