Home / 28,505.25-39,338.46-15,930

Finding the Fourth Proportional to 28,505.25, 39,338.46 and 15,930

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Solution

The fourth proportional to 28,505.25, 39,338.46 and 15,930 is: 21,984.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.25 : 39,338.46 = 15,930 : x
  2. Step 2: Convert to fraction form
    28,505.25/39,338.46 = 15,930/x
  3. Step 3: Cross multiply
    28,505.25x = 39,338.46 × 15,930
  4. Step 4: Simplify right side
    28,505.25x = 626,661,667.80
  5. Step 5: Solve for x
    x = 626,661,667.80/28,505.25
  6. Step 6: Final answer
    x = 21,984.08

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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.