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Finding the Fourth Proportional to 14,522.40, 21,786.68 and 8,285.40

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Solution

The fourth proportional to 14,522.40, 21,786.68 and 8,285.40 is: 12,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,522.40 : 21,786.68 = 8,285.40 : x
  2. Step 2: Convert to fraction form
    14,522.40/21,786.68 = 8,285.40/x
  3. Step 3: Cross multiply
    14,522.40x = 21,786.68 × 8,285.40
  4. Step 4: Simplify right side
    14,522.40x = 180,511,358.47
  5. Step 5: Solve for x
    x = 180,511,358.47/14,522.40
  6. Step 6: Final answer
    x = 12,429.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.