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Finding the Fourth Proportional to 18,999.88, 28,500.40 and 6,519.73

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Solution

The fourth proportional to 18,999.88, 28,500.40 and 6,519.73 is: 9,779.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.88 : 28,500.40 = 6,519.73 : x
  2. Step 2: Convert to fraction form
    18,999.88/28,500.40 = 6,519.73/x
  3. Step 3: Cross multiply
    18,999.88x = 28,500.40 × 6,519.73
  4. Step 4: Simplify right side
    18,999.88x = 185,814,825.34
  5. Step 5: Solve for x
    x = 185,814,825.34/18,999.88
  6. Step 6: Final answer
    x = 9,779.79

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1.5x scale

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.