Home / 18,672.57-28,013.23-7,428.55

Finding the Fourth Proportional to 18,672.57, 28,013.23 and 7,428.55

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Solution

The fourth proportional to 18,672.57, 28,013.23 and 7,428.55 is: 11,144.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.57 : 28,013.23 = 7,428.55 : x
  2. Step 2: Convert to fraction form
    18,672.57/28,013.23 = 7,428.55/x
  3. Step 3: Cross multiply
    18,672.57x = 28,013.23 × 7,428.55
  4. Step 4: Simplify right side
    18,672.57x = 208,097,539.65
  5. Step 5: Solve for x
    x = 208,097,539.65/18,672.57
  6. Step 6: Final answer
    x = 11,144.56

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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.