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Finding the Fourth Proportional to 13,633.80, 18,814.32 and 8,917.98

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Solution

The fourth proportional to 13,633.80, 18,814.32 and 8,917.98 is: 12,306.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,633.80 : 18,814.32 = 8,917.98 : x
  2. Step 2: Convert to fraction form
    13,633.80/18,814.32 = 8,917.98/x
  3. Step 3: Cross multiply
    13,633.80x = 18,814.32 × 8,917.98
  4. Step 4: Simplify right side
    13,633.80x = 167,785,729.47
  5. Step 5: Solve for x
    x = 167,785,729.47/13,633.80
  6. Step 6: Final answer
    x = 12,306.60

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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.