Home / 28,375.97-39,158.47-15,628.91

Finding the Fourth Proportional to 28,375.97, 39,158.47 and 15,628.91

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Solution

The fourth proportional to 28,375.97, 39,158.47 and 15,628.91 is: 21,567.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.97 : 39,158.47 = 15,628.91 : x
  2. Step 2: Convert to fraction form
    28,375.97/39,158.47 = 15,628.91/x
  3. Step 3: Cross multiply
    28,375.97x = 39,158.47 × 15,628.91
  4. Step 4: Simplify right side
    28,375.97x = 612,004,203.37
  5. Step 5: Solve for x
    x = 612,004,203.37/28,375.97
  6. Step 6: Final answer
    x = 21,567.69

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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.