Home / 28,711.67-39,628.44-18,115.65

Finding the Fourth Proportional to 28,711.67, 39,628.44 and 18,115.65

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Solution

The fourth proportional to 28,711.67, 39,628.44 and 18,115.65 is: 25,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,711.67 : 39,628.44 = 18,115.65 : x
  2. Step 2: Convert to fraction form
    28,711.67/39,628.44 = 18,115.65/x
  3. Step 3: Cross multiply
    28,711.67x = 39,628.44 × 18,115.65
  4. Step 4: Simplify right side
    28,711.67x = 717,894,949.09
  5. Step 5: Solve for x
    x = 717,894,949.09/28,711.67
  6. Step 6: Final answer
    x = 25,003.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.