Home / 28,382.10-39,170.38-15,636.59

Finding the Fourth Proportional to 28,382.10, 39,170.38 and 15,636.59

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Solution

The fourth proportional to 28,382.10, 39,170.38 and 15,636.59 is: 21,580.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.10 : 39,170.38 = 15,636.59 : x
  2. Step 2: Convert to fraction form
    28,382.10/39,170.38 = 15,636.59/x
  3. Step 3: Cross multiply
    28,382.10x = 39,170.38 × 15,636.59
  4. Step 4: Simplify right side
    28,382.10x = 612,491,231.04
  5. Step 5: Solve for x
    x = 612,491,231.04/28,382.10
  6. Step 6: Final answer
    x = 21,580.19

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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.