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Finding the Fourth Proportional to 18,697.50, 28,050.72 and 6,385.50

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Solution

The fourth proportional to 18,697.50, 28,050.72 and 6,385.50 is: 9,579.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.50 : 28,050.72 = 6,385.50 : x
  2. Step 2: Convert to fraction form
    18,697.50/28,050.72 = 6,385.50/x
  3. Step 3: Cross multiply
    18,697.50x = 28,050.72 × 6,385.50
  4. Step 4: Simplify right side
    18,697.50x = 179,117,872.56
  5. Step 5: Solve for x
    x = 179,117,872.56/18,697.50
  6. Step 6: Final answer
    x = 9,579.78

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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.