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Finding the Fourth Proportional to 15,092.80, 20,827.08 and 8,378.44

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Solution

The fourth proportional to 15,092.80, 20,827.08 and 8,378.44 is: 11,561.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,092.80 : 20,827.08 = 8,378.44 : x
  2. Step 2: Convert to fraction form
    15,092.80/20,827.08 = 8,378.44/x
  3. Step 3: Cross multiply
    15,092.80x = 20,827.08 × 8,378.44
  4. Step 4: Simplify right side
    15,092.80x = 174,498,336.02
  5. Step 5: Solve for x
    x = 174,498,336.02/15,092.80
  6. Step 6: Final answer
    x = 11,561.69

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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.