Home / 12,428.40-18,642.24-4,108.80

Finding the Fourth Proportional to 12,428.40, 18,642.24 and 4,108.80

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Solution

The fourth proportional to 12,428.40, 18,642.24 and 4,108.80 is: 6,163.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.40 : 18,642.24 = 4,108.80 : x
  2. Step 2: Convert to fraction form
    12,428.40/18,642.24 = 4,108.80/x
  3. Step 3: Cross multiply
    12,428.40x = 18,642.24 × 4,108.80
  4. Step 4: Simplify right side
    12,428.40x = 76,597,235.71
  5. Step 5: Solve for x
    x = 76,597,235.71/12,428.40
  6. Step 6: Final answer
    x = 6,163.08

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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.