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Finding the Fourth Proportional to 14,934.75, 20,609.54 and 8,128.47

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Solution

The fourth proportional to 14,934.75, 20,609.54 and 8,128.47 is: 11,217.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,934.75 : 20,609.54 = 8,128.47 : x
  2. Step 2: Convert to fraction form
    14,934.75/20,609.54 = 8,128.47/x
  3. Step 3: Cross multiply
    14,934.75x = 20,609.54 × 8,128.47
  4. Step 4: Simplify right side
    14,934.75x = 167,524,094.73
  5. Step 5: Solve for x
    x = 167,524,094.73/14,934.75
  6. Step 6: Final answer
    x = 11,217.07

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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.