Home / 12,185.23-18,278.49-3,420.83

Finding the Fourth Proportional to 12,185.23, 18,278.49 and 3,420.83

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Solution

The fourth proportional to 12,185.23, 18,278.49 and 3,420.83 is: 5,131.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,185.23 : 18,278.49 = 3,420.83 : x
  2. Step 2: Convert to fraction form
    12,185.23/18,278.49 = 3,420.83/x
  3. Step 3: Cross multiply
    12,185.23x = 18,278.49 × 3,420.83
  4. Step 4: Simplify right side
    12,185.23x = 62,527,543.41
  5. Step 5: Solve for x
    x = 62,527,543.41/12,185.23
  6. Step 6: Final answer
    x = 5,131.42

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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.