Home / 12,438.68-18,655.72-4,118.80

Finding the Fourth Proportional to 12,438.68, 18,655.72 and 4,118.80

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Solution

The fourth proportional to 12,438.68, 18,655.72 and 4,118.80 is: 6,177.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.68 : 18,655.72 = 4,118.80 : x
  2. Step 2: Convert to fraction form
    12,438.68/18,655.72 = 4,118.80/x
  3. Step 3: Cross multiply
    12,438.68x = 18,655.72 × 4,118.80
  4. Step 4: Simplify right side
    12,438.68x = 76,839,179.54
  5. Step 5: Solve for x
    x = 76,839,179.54/12,438.68
  6. Step 6: Final answer
    x = 6,177.44

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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.