Home / 18,929.55-28,339.32-11,007.90

Finding the Fourth Proportional to 18,929.55, 28,339.32 and 11,007.90

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Solution

The fourth proportional to 18,929.55, 28,339.32 and 11,007.90 is: 16,479.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.55 : 28,339.32 = 11,007.90 : x
  2. Step 2: Convert to fraction form
    18,929.55/28,339.32 = 11,007.90/x
  3. Step 3: Cross multiply
    18,929.55x = 28,339.32 × 11,007.90
  4. Step 4: Simplify right side
    18,929.55x = 311,956,379.99
  5. Step 5: Solve for x
    x = 311,956,379.99/18,929.55
  6. Step 6: Final answer
    x = 16,479.86

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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.