Home / 21,255.38-31,869.40-10,161.82

Finding the Fourth Proportional to 21,255.38, 31,869.40 and 10,161.82

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Solution

The fourth proportional to 21,255.38, 31,869.40 and 10,161.82 is: 15,236.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.38 : 31,869.40 = 10,161.82 : x
  2. Step 2: Convert to fraction form
    21,255.38/31,869.40 = 10,161.82/x
  3. Step 3: Cross multiply
    21,255.38x = 31,869.40 × 10,161.82
  4. Step 4: Simplify right side
    21,255.38x = 323,851,106.31
  5. Step 5: Solve for x
    x = 323,851,106.31/21,255.38
  6. Step 6: Final answer
    x = 15,236.19

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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.