Home / 12,428.02-18,642.60-4,108.78

Finding the Fourth Proportional to 12,428.02, 18,642.60 and 4,108.78

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Solution

The fourth proportional to 12,428.02, 18,642.60 and 4,108.78 is: 6,163.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.02 : 18,642.60 = 4,108.78 : x
  2. Step 2: Convert to fraction form
    12,428.02/18,642.60 = 4,108.78/x
  3. Step 3: Cross multiply
    12,428.02x = 18,642.60 × 4,108.78
  4. Step 4: Simplify right side
    12,428.02x = 76,598,342.03
  5. Step 5: Solve for x
    x = 76,598,342.03/12,428.02
  6. Step 6: Final answer
    x = 6,163.36

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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.