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Finding the Fourth Proportional to 18,999.75, 28,500.03 and 6,519.72

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Solution

The fourth proportional to 18,999.75, 28,500.03 and 6,519.72 is: 9,779.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.75 : 28,500.03 = 6,519.72 : x
  2. Step 2: Convert to fraction form
    18,999.75/28,500.03 = 6,519.72/x
  3. Step 3: Cross multiply
    18,999.75x = 28,500.03 × 6,519.72
  4. Step 4: Simplify right side
    18,999.75x = 185,812,215.59
  5. Step 5: Solve for x
    x = 185,812,215.59/18,999.75
  6. Step 6: Final answer
    x = 9,779.72

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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.