Home / 28,513.12-39,349.92-15,938.80

Finding the Fourth Proportional to 28,513.12, 39,349.92 and 15,938.80

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Solution

The fourth proportional to 28,513.12, 39,349.92 and 15,938.80 is: 21,996.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.12 : 39,349.92 = 15,938.80 : x
  2. Step 2: Convert to fraction form
    28,513.12/39,349.92 = 15,938.80/x
  3. Step 3: Cross multiply
    28,513.12x = 39,349.92 × 15,938.80
  4. Step 4: Simplify right side
    28,513.12x = 627,190,504.90
  5. Step 5: Solve for x
    x = 627,190,504.90/28,513.12
  6. Step 6: Final answer
    x = 21,996.56

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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.