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Finding the Fourth Proportional to 20,383.86, 30,572.22 and 5,391.12

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Solution

The fourth proportional to 20,383.86, 30,572.22 and 5,391.12 is: 8,085.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,383.86 : 30,572.22 = 5,391.12 : x
  2. Step 2: Convert to fraction form
    20,383.86/30,572.22 = 5,391.12/x
  3. Step 3: Cross multiply
    20,383.86x = 30,572.22 × 5,391.12
  4. Step 4: Simplify right side
    20,383.86x = 164,818,506.69
  5. Step 5: Solve for x
    x = 164,818,506.69/20,383.86
  6. Step 6: Final answer
    x = 8,085.74

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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.