Home / 28,436.71-39,234.77-18,365.57

Finding the Fourth Proportional to 28,436.71, 39,234.77 and 18,365.57

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Solution

The fourth proportional to 28,436.71, 39,234.77 and 18,365.57 is: 25,339.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.71 : 39,234.77 = 18,365.57 : x
  2. Step 2: Convert to fraction form
    28,436.71/39,234.77 = 18,365.57/x
  3. Step 3: Cross multiply
    28,436.71x = 39,234.77 × 18,365.57
  4. Step 4: Simplify right side
    28,436.71x = 720,568,914.87
  5. Step 5: Solve for x
    x = 720,568,914.87/28,436.71
  6. Step 6: Final answer
    x = 25,339.40

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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.