Home / 38,511.30-57,738.15-21,000.90

Finding the Fourth Proportional to 38,511.30, 57,738.15 and 21,000.90

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Solution

The fourth proportional to 38,511.30, 57,738.15 and 21,000.90 is: 31,485.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,511.30 : 57,738.15 = 21,000.90 : x
  2. Step 2: Convert to fraction form
    38,511.30/57,738.15 = 21,000.90/x
  3. Step 3: Cross multiply
    38,511.30x = 57,738.15 × 21,000.90
  4. Step 4: Simplify right side
    38,511.30x = 1,212,553,114.34
  5. Step 5: Solve for x
    x = 1,212,553,114.34/38,511.30
  6. Step 6: Final answer
    x = 31,485.64

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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.