Home / 20,146.10-30,219.15-12,359.30

Finding the Fourth Proportional to 20,146.10, 30,219.15 and 12,359.30

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Solution

The fourth proportional to 20,146.10, 30,219.15 and 12,359.30 is: 18,538.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.10 : 30,219.15 = 12,359.30 : x
  2. Step 2: Convert to fraction form
    20,146.10/30,219.15 = 12,359.30/x
  3. Step 3: Cross multiply
    20,146.10x = 30,219.15 × 12,359.30
  4. Step 4: Simplify right side
    20,146.10x = 373,487,540.60
  5. Step 5: Solve for x
    x = 373,487,540.60/20,146.10
  6. Step 6: Final answer
    x = 18,538.95

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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.