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Finding the Fourth Proportional to 18,997.68, 28,479.09 and 7,302.09

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Solution

The fourth proportional to 18,997.68, 28,479.09 and 7,302.09 is: 10,946.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,997.68 : 28,479.09 = 7,302.09 : x
  2. Step 2: Convert to fraction form
    18,997.68/28,479.09 = 7,302.09/x
  3. Step 3: Cross multiply
    18,997.68x = 28,479.09 × 7,302.09
  4. Step 4: Simplify right side
    18,997.68x = 207,956,878.30
  5. Step 5: Solve for x
    x = 207,956,878.30/18,997.68
  6. Step 6: Final answer
    x = 10,946.44

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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.