Home / 12,279.36-18,416.48-3,960.16

Finding the Fourth Proportional to 12,279.36, 18,416.48 and 3,960.16

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Solution

The fourth proportional to 12,279.36, 18,416.48 and 3,960.16 is: 5,939.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.36 : 18,416.48 = 3,960.16 : x
  2. Step 2: Convert to fraction form
    12,279.36/18,416.48 = 3,960.16/x
  3. Step 3: Cross multiply
    12,279.36x = 18,416.48 × 3,960.16
  4. Step 4: Simplify right side
    12,279.36x = 72,932,207.44
  5. Step 5: Solve for x
    x = 72,932,207.44/12,279.36
  6. Step 6: Final answer
    x = 5,939.41

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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.