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Finding the Fourth Proportional to 15,085.43, 20,817.43 and 8,371.21

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Solution

The fourth proportional to 15,085.43, 20,817.43 and 8,371.21 is: 11,552.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,085.43 : 20,817.43 = 8,371.21 : x
  2. Step 2: Convert to fraction form
    15,085.43/20,817.43 = 8,371.21/x
  3. Step 3: Cross multiply
    15,085.43x = 20,817.43 × 8,371.21
  4. Step 4: Simplify right side
    15,085.43x = 174,267,078.19
  5. Step 5: Solve for x
    x = 174,267,078.19/15,085.43
  6. Step 6: Final answer
    x = 11,552.01

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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.