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Finding the Fourth Proportional to 21,908,659.59, 32,865,978.60 and 9,126,174.96

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Solution

The fourth proportional to 21,908,659.59, 32,865,978.60 and 9,126,174.96 is: 13,690,507.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,908,659.59 : 32,865,978.60 = 9,126,174.96 : x
  2. Step 2: Convert to fraction form
    21,908,659.59/32,865,978.60 = 9,126,174.96/x
  3. Step 3: Cross multiply
    21,908,659.59x = 32,865,978.60 × 9,126,174.96
  4. Step 4: Simplify right side
    21,908,659.59x = 299,940,670,935,215.88
  5. Step 5: Solve for x
    x = 299,940,670,935,215.88/21,908,659.59
  6. Step 6: Final answer
    x = 13,690,507.61

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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.