Home / 12,186.45-18,285.35-5,521.77

Finding the Fourth Proportional to 12,186.45, 18,285.35 and 5,521.77

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Solution

The fourth proportional to 12,186.45, 18,285.35 and 5,521.77 is: 8,285.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.45 : 18,285.35 = 5,521.77 : x
  2. Step 2: Convert to fraction form
    12,186.45/18,285.35 = 5,521.77/x
  3. Step 3: Cross multiply
    12,186.45x = 18,285.35 × 5,521.77
  4. Step 4: Simplify right side
    12,186.45x = 100,967,469.46
  5. Step 5: Solve for x
    x = 100,967,469.46/12,186.45
  6. Step 6: Final answer
    x = 8,285.22

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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.