Home / 18,942.30-28,421.55-11,927.70

Finding the Fourth Proportional to 18,942.30, 28,421.55 and 11,927.70

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Solution

The fourth proportional to 18,942.30, 28,421.55 and 11,927.70 is: 17,896.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,942.30 : 28,421.55 = 11,927.70 : x
  2. Step 2: Convert to fraction form
    18,942.30/28,421.55 = 11,927.70/x
  3. Step 3: Cross multiply
    18,942.30x = 28,421.55 × 11,927.70
  4. Step 4: Simplify right side
    18,942.30x = 339,003,721.94
  5. Step 5: Solve for x
    x = 339,003,721.94/18,942.30
  6. Step 6: Final answer
    x = 17,896.65

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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.