Home / 12,183.18-16,815.45-7,712.89

Finding the Fourth Proportional to 12,183.18, 16,815.45 and 7,712.89

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Solution

The fourth proportional to 12,183.18, 16,815.45 and 7,712.89 is: 10,645.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,183.18 : 16,815.45 = 7,712.89 : x
  2. Step 2: Convert to fraction form
    12,183.18/16,815.45 = 7,712.89/x
  3. Step 3: Cross multiply
    12,183.18x = 16,815.45 × 7,712.89
  4. Step 4: Simplify right side
    12,183.18x = 129,695,659.65
  5. Step 5: Solve for x
    x = 129,695,659.65/12,183.18
  6. Step 6: Final answer
    x = 10,645.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.