Home / 20,146.20-30,186.90-10,270.68

Finding the Fourth Proportional to 20,146.20, 30,186.90 and 10,270.68

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Solution

The fourth proportional to 20,146.20, 30,186.90 and 10,270.68 is: 15,389.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,146.20 : 30,186.90 = 10,270.68 : x
  2. Step 2: Convert to fraction form
    20,146.20/30,186.90 = 10,270.68/x
  3. Step 3: Cross multiply
    20,146.20x = 30,186.90 × 10,270.68
  4. Step 4: Simplify right side
    20,146.20x = 310,039,990.09
  5. Step 5: Solve for x
    x = 310,039,990.09/20,146.20
  6. Step 6: Final answer
    x = 15,389.50

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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.