Home / 18,815.56-28,187.70-12,556.69

Finding the Fourth Proportional to 18,815.56, 28,187.70 and 12,556.69

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Solution

The fourth proportional to 18,815.56, 28,187.70 and 12,556.69 is: 18,811.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.56 : 28,187.70 = 12,556.69 : x
  2. Step 2: Convert to fraction form
    18,815.56/28,187.70 = 12,556.69/x
  3. Step 3: Cross multiply
    18,815.56x = 28,187.70 × 12,556.69
  4. Step 4: Simplify right side
    18,815.56x = 353,944,210.71
  5. Step 5: Solve for x
    x = 353,944,210.71/18,815.56
  6. Step 6: Final answer
    x = 18,811.25

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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.