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Finding the Fourth Proportional to 15,092.55, 20,828.25 and 8,378.28

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Solution

The fourth proportional to 15,092.55, 20,828.25 and 8,378.28 is: 11,562.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,092.55 : 20,828.25 = 8,378.28 : x
  2. Step 2: Convert to fraction form
    15,092.55/20,828.25 = 8,378.28/x
  3. Step 3: Cross multiply
    15,092.55x = 20,828.25 × 8,378.28
  4. Step 4: Simplify right side
    15,092.55x = 174,504,910.41
  5. Step 5: Solve for x
    x = 174,504,910.41/15,092.55
  6. Step 6: Final answer
    x = 11,562.32

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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.