Home / 21,405.72-32,108.34-6,612.96

Finding the Fourth Proportional to 21,405.72, 32,108.34 and 6,612.96

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Solution

The fourth proportional to 21,405.72, 32,108.34 and 6,612.96 is: 9,919.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.72 : 32,108.34 = 6,612.96 : x
  2. Step 2: Convert to fraction form
    21,405.72/32,108.34 = 6,612.96/x
  3. Step 3: Cross multiply
    21,405.72x = 32,108.34 × 6,612.96
  4. Step 4: Simplify right side
    21,405.72x = 212,331,168.09
  5. Step 5: Solve for x
    x = 212,331,168.09/21,405.72
  6. Step 6: Final answer
    x = 9,919.37

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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.