Home / 21,212.37-31,824.38-6,421.87

Finding the Fourth Proportional to 21,212.37, 31,824.38 and 6,421.87

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Solution

The fourth proportional to 21,212.37, 31,824.38 and 6,421.87 is: 9,634.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,212.37 : 31,824.38 = 6,421.87 : x
  2. Step 2: Convert to fraction form
    21,212.37/31,824.38 = 6,421.87/x
  3. Step 3: Cross multiply
    21,212.37x = 31,824.38 × 6,421.87
  4. Step 4: Simplify right side
    21,212.37x = 204,372,031.19
  5. Step 5: Solve for x
    x = 204,372,031.19/21,212.37
  6. Step 6: Final answer
    x = 9,634.57

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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.