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Finding the Fourth Proportional to 21,602, 32,406.24 and 9,908.84

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Solution

The fourth proportional to 21,602, 32,406.24 and 9,908.84 is: 14,864.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602 : 32,406.24 = 9,908.84 : x
  2. Step 2: Convert to fraction form
    21,602/32,406.24 = 9,908.84/x
  3. Step 3: Cross multiply
    21,602x = 32,406.24 × 9,908.84
  4. Step 4: Simplify right side
    21,602x = 321,108,247.16
  5. Step 5: Solve for x
    x = 321,108,247.16/21,602
  6. Step 6: Final answer
    x = 14,864.75

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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.