Home / 28,480.20-39,299.32-15,732.64

Finding the Fourth Proportional to 28,480.20, 39,299.32 and 15,732.64

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Solution

The fourth proportional to 28,480.20, 39,299.32 and 15,732.64 is: 21,709.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.20 : 39,299.32 = 15,732.64 : x
  2. Step 2: Convert to fraction form
    28,480.20/39,299.32 = 15,732.64/x
  3. Step 3: Cross multiply
    28,480.20x = 39,299.32 × 15,732.64
  4. Step 4: Simplify right side
    28,480.20x = 618,282,053.80
  5. Step 5: Solve for x
    x = 618,282,053.80/28,480.20
  6. Step 6: Final answer
    x = 21,709.19

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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.