Home / 12,218.88-18,331.02-4,428.30

Finding the Fourth Proportional to 12,218.88, 18,331.02 and 4,428.30

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Solution

The fourth proportional to 12,218.88, 18,331.02 and 4,428.30 is: 6,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.88 : 18,331.02 = 4,428.30 : x
  2. Step 2: Convert to fraction form
    12,218.88/18,331.02 = 4,428.30/x
  3. Step 3: Cross multiply
    12,218.88x = 18,331.02 × 4,428.30
  4. Step 4: Simplify right side
    12,218.88x = 81,175,255.87
  5. Step 5: Solve for x
    x = 81,175,255.87/12,218.88
  6. Step 6: Final answer
    x = 6,643.43

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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.