Home / 21,312.96-31,989.15-10,790.37

Finding the Fourth Proportional to 21,312.96, 31,989.15 and 10,790.37

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Solution

The fourth proportional to 21,312.96, 31,989.15 and 10,790.37 is: 16,195.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,312.96 : 31,989.15 = 10,790.37 : x
  2. Step 2: Convert to fraction form
    21,312.96/31,989.15 = 10,790.37/x
  3. Step 3: Cross multiply
    21,312.96x = 31,989.15 × 10,790.37
  4. Step 4: Simplify right side
    21,312.96x = 345,174,764.49
  5. Step 5: Solve for x
    x = 345,174,764.49/21,312.96
  6. Step 6: Final answer
    x = 16,195.54

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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.