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Finding the Fourth Proportional to 20,676.80, 28,532.10 and 11,725.10

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Solution

The fourth proportional to 20,676.80, 28,532.10 and 11,725.10 is: 16,179.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.80 : 28,532.10 = 11,725.10 : x
  2. Step 2: Convert to fraction form
    20,676.80/28,532.10 = 11,725.10/x
  3. Step 3: Cross multiply
    20,676.80x = 28,532.10 × 11,725.10
  4. Step 4: Simplify right side
    20,676.80x = 334,541,725.71
  5. Step 5: Solve for x
    x = 334,541,725.71/20,676.80
  6. Step 6: Final answer
    x = 16,179.57

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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.