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Finding the Fourth Proportional to 21,904.61, 32,859.63 and 8,575.88

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Solution

The fourth proportional to 21,904.61, 32,859.63 and 8,575.88 is: 12,864.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.61 : 32,859.63 = 8,575.88 : x
  2. Step 2: Convert to fraction form
    21,904.61/32,859.63 = 8,575.88/x
  3. Step 3: Cross multiply
    21,904.61x = 32,859.63 × 8,575.88
  4. Step 4: Simplify right side
    21,904.61x = 281,800,079.43
  5. Step 5: Solve for x
    x = 281,800,079.43/21,904.61
  6. Step 6: Final answer
    x = 12,864.88

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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.