Home / 28,505.82-39,338.09-15,930.57

Finding the Fourth Proportional to 28,505.82, 39,338.09 and 15,930.57

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Solution

The fourth proportional to 28,505.82, 39,338.09 and 15,930.57 is: 21,984.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.82 : 39,338.09 = 15,930.57 : x
  2. Step 2: Convert to fraction form
    28,505.82/39,338.09 = 15,930.57/x
  3. Step 3: Cross multiply
    28,505.82x = 39,338.09 × 15,930.57
  4. Step 4: Simplify right side
    28,505.82x = 626,678,196.41
  5. Step 5: Solve for x
    x = 626,678,196.41/28,505.82
  6. Step 6: Final answer
    x = 21,984.22

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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.