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Finding the Fourth Proportional to 28,249.60, 38,980.04 and 16,310.64

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Solution

The fourth proportional to 28,249.60, 38,980.04 and 16,310.64 is: 22,506.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,249.60 : 38,980.04 = 16,310.64 : x
  2. Step 2: Convert to fraction form
    28,249.60/38,980.04 = 16,310.64/x
  3. Step 3: Cross multiply
    28,249.60x = 38,980.04 × 16,310.64
  4. Step 4: Simplify right side
    28,249.60x = 635,789,399.63
  5. Step 5: Solve for x
    x = 635,789,399.63/28,249.60
  6. Step 6: Final answer
    x = 22,506.14

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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.