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Finding the Fourth Proportional to 20,600.78, 30,893.17 and 7,089.38

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Solution

The fourth proportional to 20,600.78, 30,893.17 and 7,089.38 is: 10,631.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,600.78 : 30,893.17 = 7,089.38 : x
  2. Step 2: Convert to fraction form
    20,600.78/30,893.17 = 7,089.38/x
  3. Step 3: Cross multiply
    20,600.78x = 30,893.17 × 7,089.38
  4. Step 4: Simplify right side
    20,600.78x = 219,013,421.53
  5. Step 5: Solve for x
    x = 219,013,421.53/20,600.78
  6. Step 6: Final answer
    x = 10,631.32

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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.