Home / 20,186.10-30,279.15-12,399.30

Finding the Fourth Proportional to 20,186.10, 30,279.15 and 12,399.30

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Solution

The fourth proportional to 20,186.10, 30,279.15 and 12,399.30 is: 18,598.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,186.10 : 30,279.15 = 12,399.30 : x
  2. Step 2: Convert to fraction form
    20,186.10/30,279.15 = 12,399.30/x
  3. Step 3: Cross multiply
    20,186.10x = 30,279.15 × 12,399.30
  4. Step 4: Simplify right side
    20,186.10x = 375,440,264.60
  5. Step 5: Solve for x
    x = 375,440,264.60/20,186.10
  6. Step 6: Final answer
    x = 18,598.95

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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.