Home / 20,123.53-30,185.29-8,436.75

Finding the Fourth Proportional to 20,123.53, 30,185.29 and 8,436.75

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Solution

The fourth proportional to 20,123.53, 30,185.29 and 8,436.75 is: 12,655.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.53 : 30,185.29 = 8,436.75 : x
  2. Step 2: Convert to fraction form
    20,123.53/30,185.29 = 8,436.75/x
  3. Step 3: Cross multiply
    20,123.53x = 30,185.29 × 8,436.75
  4. Step 4: Simplify right side
    20,123.53x = 254,665,745.41
  5. Step 5: Solve for x
    x = 254,665,745.41/20,123.53
  6. Step 6: Final answer
    x = 12,655.12

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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.