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Finding the Fourth Proportional to 18,953.87, 28,411.02 and 6,469.74

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Solution

The fourth proportional to 18,953.87, 28,411.02 and 6,469.74 is: 9,697.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,953.87 : 28,411.02 = 6,469.74 : x
  2. Step 2: Convert to fraction form
    18,953.87/28,411.02 = 6,469.74/x
  3. Step 3: Cross multiply
    18,953.87x = 28,411.02 × 6,469.74
  4. Step 4: Simplify right side
    18,953.87x = 183,811,912.53
  5. Step 5: Solve for x
    x = 183,811,912.53/18,953.87
  6. Step 6: Final answer
    x = 9,697.86

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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.