Home / 12,279.70-18,383.10-8,124.40

Finding the Fourth Proportional to 12,279.70, 18,383.10 and 8,124.40

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Solution

The fourth proportional to 12,279.70, 18,383.10 and 8,124.40 is: 12,162.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.70 : 18,383.10 = 8,124.40 : x
  2. Step 2: Convert to fraction form
    12,279.70/18,383.10 = 8,124.40/x
  3. Step 3: Cross multiply
    12,279.70x = 18,383.10 × 8,124.40
  4. Step 4: Simplify right side
    12,279.70x = 149,351,657.64
  5. Step 5: Solve for x
    x = 149,351,657.64/12,279.70
  6. Step 6: Final answer
    x = 12,162.48

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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.