Home / 12,186.72-18,280.26-3,421.80

Finding the Fourth Proportional to 12,186.72, 18,280.26 and 3,421.80

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Solution

The fourth proportional to 12,186.72, 18,280.26 and 3,421.80 is: 5,132.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.72 : 18,280.26 = 3,421.80 : x
  2. Step 2: Convert to fraction form
    12,186.72/18,280.26 = 3,421.80/x
  3. Step 3: Cross multiply
    12,186.72x = 18,280.26 × 3,421.80
  4. Step 4: Simplify right side
    12,186.72x = 62,551,393.67
  5. Step 5: Solve for x
    x = 62,551,393.67/12,186.72
  6. Step 6: Final answer
    x = 5,132.75

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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.