Home / 21,256.11-31,877.34-7,021.41

Finding the Fourth Proportional to 21,256.11, 31,877.34 and 7,021.41

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Solution

The fourth proportional to 21,256.11, 31,877.34 and 7,021.41 is: 10,529.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,256.11 : 31,877.34 = 7,021.41 : x
  2. Step 2: Convert to fraction form
    21,256.11/31,877.34 = 7,021.41/x
  3. Step 3: Cross multiply
    21,256.11x = 31,877.34 × 7,021.41
  4. Step 4: Simplify right side
    21,256.11x = 223,823,873.85
  5. Step 5: Solve for x
    x = 223,823,873.85/21,256.11
  6. Step 6: Final answer
    x = 10,529.86

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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.