Home / 28,628.37-39,509.17-15,882.78

Finding the Fourth Proportional to 28,628.37, 39,509.17 and 15,882.78

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Solution

The fourth proportional to 28,628.37, 39,509.17 and 15,882.78 is: 21,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,628.37 : 39,509.17 = 15,882.78 : x
  2. Step 2: Convert to fraction form
    28,628.37/39,509.17 = 15,882.78/x
  3. Step 3: Cross multiply
    28,628.37x = 39,509.17 × 15,882.78
  4. Step 4: Simplify right side
    28,628.37x = 627,515,563.55
  5. Step 5: Solve for x
    x = 627,515,563.55/28,628.37
  6. Step 6: Final answer
    x = 21,919.36

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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.