Home / 18,688.44-28,013.76-12,118.80

Finding the Fourth Proportional to 18,688.44, 28,013.76 and 12,118.80

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Solution

The fourth proportional to 18,688.44, 28,013.76 and 12,118.80 is: 18,165.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.44 : 28,013.76 = 12,118.80 : x
  2. Step 2: Convert to fraction form
    18,688.44/28,013.76 = 12,118.80/x
  3. Step 3: Cross multiply
    18,688.44x = 28,013.76 × 12,118.80
  4. Step 4: Simplify right side
    18,688.44x = 339,493,154.69
  5. Step 5: Solve for x
    x = 339,493,154.69/18,688.44
  6. Step 6: Final answer
    x = 18,165.94

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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.