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Finding the Fourth Proportional to 14,982.20, 20,682.94 and 9,318.78

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Solution

The fourth proportional to 14,982.20, 20,682.94 and 9,318.78 is: 12,864.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,982.20 : 20,682.94 = 9,318.78 : x
  2. Step 2: Convert to fraction form
    14,982.20/20,682.94 = 9,318.78/x
  3. Step 3: Cross multiply
    14,982.20x = 20,682.94 × 9,318.78
  4. Step 4: Simplify right side
    14,982.20x = 192,739,767.61
  5. Step 5: Solve for x
    x = 192,739,767.61/14,982.20
  6. Step 6: Final answer
    x = 12,864.58

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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.