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Finding the Fourth Proportional to 14,758.84, 20,365.56 and 8,789.68

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Solution

The fourth proportional to 14,758.84, 20,365.56 and 8,789.68 is: 12,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,758.84 : 20,365.56 = 8,789.68 : x
  2. Step 2: Convert to fraction form
    14,758.84/20,365.56 = 8,789.68/x
  3. Step 3: Cross multiply
    14,758.84x = 20,365.56 × 8,789.68
  4. Step 4: Simplify right side
    14,758.84x = 179,006,755.42
  5. Step 5: Solve for x
    x = 179,006,755.42/14,758.84
  6. Step 6: Final answer
    x = 12,128.78

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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.