Home / 12,138.85-18,194.10-5,565.70

Finding the Fourth Proportional to 12,138.85, 18,194.10 and 5,565.70

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Solution

The fourth proportional to 12,138.85, 18,194.10 and 5,565.70 is: 8,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.85 : 18,194.10 = 5,565.70 : x
  2. Step 2: Convert to fraction form
    12,138.85/18,194.10 = 5,565.70/x
  3. Step 3: Cross multiply
    12,138.85x = 18,194.10 × 5,565.70
  4. Step 4: Simplify right side
    12,138.85x = 101,262,902.37
  5. Step 5: Solve for x
    x = 101,262,902.37/12,138.85
  6. Step 6: Final answer
    x = 8,342.05

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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.