Home / 20,286.13-30,393.15-12,384.91

Finding the Fourth Proportional to 20,286.13, 30,393.15 and 12,384.91

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Solution

The fourth proportional to 20,286.13, 30,393.15 and 12,384.91 is: 18,555.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.13 : 30,393.15 = 12,384.91 : x
  2. Step 2: Convert to fraction form
    20,286.13/30,393.15 = 12,384.91/x
  3. Step 3: Cross multiply
    20,286.13x = 30,393.15 × 12,384.91
  4. Step 4: Simplify right side
    20,286.13x = 376,416,496.49
  5. Step 5: Solve for x
    x = 376,416,496.49/20,286.13
  6. Step 6: Final answer
    x = 18,555.36

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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.