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Finding the Fourth Proportional to 20,701.86, 30,893.75 and 18,487.46

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Solution

The fourth proportional to 20,701.86, 30,893.75 and 18,487.46 is: 27,589.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,701.86 : 30,893.75 = 18,487.46 : x
  2. Step 2: Convert to fraction form
    20,701.86/30,893.75 = 18,487.46/x
  3. Step 3: Cross multiply
    20,701.86x = 30,893.75 × 18,487.46
  4. Step 4: Simplify right side
    20,701.86x = 571,146,874.94
  5. Step 5: Solve for x
    x = 571,146,874.94/20,701.86
  6. Step 6: Final answer
    x = 27,589.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.