Home / 12,431.02-18,647.10-4,111.78

Finding the Fourth Proportional to 12,431.02, 18,647.10 and 4,111.78

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Solution

The fourth proportional to 12,431.02, 18,647.10 and 4,111.78 is: 6,167.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.02 : 18,647.10 = 4,111.78 : x
  2. Step 2: Convert to fraction form
    12,431.02/18,647.10 = 4,111.78/x
  3. Step 3: Cross multiply
    12,431.02x = 18,647.10 × 4,111.78
  4. Step 4: Simplify right side
    12,431.02x = 76,672,772.84
  5. Step 5: Solve for x
    x = 76,672,772.84/12,431.02
  6. Step 6: Final answer
    x = 6,167.86

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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.