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Finding the Fourth Proportional to 21,381.44, 32,054.88 and 8,910.86

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Solution

The fourth proportional to 21,381.44, 32,054.88 and 8,910.86 is: 13,359.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,381.44 : 32,054.88 = 8,910.86 : x
  2. Step 2: Convert to fraction form
    21,381.44/32,054.88 = 8,910.86/x
  3. Step 3: Cross multiply
    21,381.44x = 32,054.88 × 8,910.86
  4. Step 4: Simplify right side
    21,381.44x = 285,636,548.00
  5. Step 5: Solve for x
    x = 285,636,548.00/21,381.44
  6. Step 6: Final answer
    x = 13,359.09

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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.