Home / 12,279.21-18,420.50-3,956.46

Finding the Fourth Proportional to 12,279.21, 18,420.50 and 3,956.46

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Solution

The fourth proportional to 12,279.21, 18,420.50 and 3,956.46 is: 5,935.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.21 : 18,420.50 = 3,956.46 : x
  2. Step 2: Convert to fraction form
    12,279.21/18,420.50 = 3,956.46/x
  3. Step 3: Cross multiply
    12,279.21x = 18,420.50 × 3,956.46
  4. Step 4: Simplify right side
    12,279.21x = 72,879,971.43
  5. Step 5: Solve for x
    x = 72,879,971.43/12,279.21
  6. Step 6: Final answer
    x = 5,935.23

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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.