Home / 21,229.15-31,813.54-15,638.53

Finding the Fourth Proportional to 21,229.15, 31,813.54 and 15,638.53

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Solution

The fourth proportional to 21,229.15, 31,813.54 and 15,638.53 is: 23,435.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.15 : 31,813.54 = 15,638.53 : x
  2. Step 2: Convert to fraction form
    21,229.15/31,813.54 = 15,638.53/x
  3. Step 3: Cross multiply
    21,229.15x = 31,813.54 × 15,638.53
  4. Step 4: Simplify right side
    21,229.15x = 497,516,999.70
  5. Step 5: Solve for x
    x = 497,516,999.70/21,229.15
  6. Step 6: Final answer
    x = 23,435.56

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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.