Home / 20,146.12-30,185.06-12,338.62

Finding the Fourth Proportional to 20,146.12, 30,185.06 and 12,338.62

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Solution

The fourth proportional to 20,146.12, 30,185.06 and 12,338.62 is: 18,487.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.12 : 30,185.06 = 12,338.62 : x
  2. Step 2: Convert to fraction form
    20,146.12/30,185.06 = 12,338.62/x
  3. Step 3: Cross multiply
    20,146.12x = 30,185.06 × 12,338.62
  4. Step 4: Simplify right side
    20,146.12x = 372,441,985.02
  5. Step 5: Solve for x
    x = 372,441,985.02/20,146.12
  6. Step 6: Final answer
    x = 18,487.03

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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.