Home / 13,431.02-18,531.82-8,125.72

Finding the Fourth Proportional to 13,431.02, 18,531.82 and 8,125.72

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Solution

The fourth proportional to 13,431.02, 18,531.82 and 8,125.72 is: 11,211.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.02 : 18,531.82 = 8,125.72 : x
  2. Step 2: Convert to fraction form
    13,431.02/18,531.82 = 8,125.72/x
  3. Step 3: Cross multiply
    13,431.02x = 18,531.82 × 8,125.72
  4. Step 4: Simplify right side
    13,431.02x = 150,584,380.41
  5. Step 5: Solve for x
    x = 150,584,380.41/13,431.02
  6. Step 6: Final answer
    x = 11,211.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.