Home / 12,279.88-18,415.59-3,512.44

Finding the Fourth Proportional to 12,279.88, 18,415.59 and 3,512.44

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Solution

The fourth proportional to 12,279.88, 18,415.59 and 3,512.44 is: 5,267.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.88 : 18,415.59 = 3,512.44 : x
  2. Step 2: Convert to fraction form
    12,279.88/18,415.59 = 3,512.44/x
  3. Step 3: Cross multiply
    12,279.88x = 18,415.59 × 3,512.44
  4. Step 4: Simplify right side
    12,279.88x = 64,683,654.94
  5. Step 5: Solve for x
    x = 64,683,654.94/12,279.88
  6. Step 6: Final answer
    x = 5,267.45

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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.