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Finding the Fourth Proportional to 30,893.14, 42,640.17 and 20,297.14

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Solution

The fourth proportional to 30,893.14, 42,640.17 and 20,297.14 is: 28,015.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,893.14 : 42,640.17 = 20,297.14 : x
  2. Step 2: Convert to fraction form
    30,893.14/42,640.17 = 20,297.14/x
  3. Step 3: Cross multiply
    30,893.14x = 42,640.17 × 20,297.14
  4. Step 4: Simplify right side
    30,893.14x = 865,473,500.11
  5. Step 5: Solve for x
    x = 865,473,500.11/30,893.14
  6. Step 6: Final answer
    x = 28,015.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.