Home / 28,613.94-39,485.25-15,867.78

Finding the Fourth Proportional to 28,613.94, 39,485.25 and 15,867.78

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Solution

The fourth proportional to 28,613.94, 39,485.25 and 15,867.78 is: 21,896.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.94 : 39,485.25 = 15,867.78 : x
  2. Step 2: Convert to fraction form
    28,613.94/39,485.25 = 15,867.78/x
  3. Step 3: Cross multiply
    28,613.94x = 39,485.25 × 15,867.78
  4. Step 4: Simplify right side
    28,613.94x = 626,543,260.25
  5. Step 5: Solve for x
    x = 626,543,260.25/28,613.94
  6. Step 6: Final answer
    x = 21,896.43

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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.