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Finding the Fourth Proportional to 15,037.90, 20,751 and 8,662.84

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Solution

The fourth proportional to 15,037.90, 20,751 and 8,662.84 is: 11,953.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,037.90 : 20,751 = 8,662.84 : x
  2. Step 2: Convert to fraction form
    15,037.90/20,751 = 8,662.84/x
  3. Step 3: Cross multiply
    15,037.90x = 20,751 × 8,662.84
  4. Step 4: Simplify right side
    15,037.90x = 179,762,592.84
  5. Step 5: Solve for x
    x = 179,762,592.84/15,037.90
  6. Step 6: Final answer
    x = 11,953.97

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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.