Home / 12,279.97-18,416.36-4,381.21

Finding the Fourth Proportional to 12,279.97, 18,416.36 and 4,381.21

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Solution

The fourth proportional to 12,279.97, 18,416.36 and 4,381.21 is: 6,570.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.97 : 18,416.36 = 4,381.21 : x
  2. Step 2: Convert to fraction form
    12,279.97/18,416.36 = 4,381.21/x
  3. Step 3: Cross multiply
    12,279.97x = 18,416.36 × 4,381.21
  4. Step 4: Simplify right side
    12,279.97x = 80,685,918.69
  5. Step 5: Solve for x
    x = 80,685,918.69/12,279.97
  6. Step 6: Final answer
    x = 6,570.53

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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.