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Finding the Fourth Proportional to 13,703.92, 20,542.92 and 5,389.27

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Solution

The fourth proportional to 13,703.92, 20,542.92 and 5,389.27 is: 8,078.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.92 : 20,542.92 = 5,389.27 : x
  2. Step 2: Convert to fraction form
    13,703.92/20,542.92 = 5,389.27/x
  3. Step 3: Cross multiply
    13,703.92x = 20,542.92 × 5,389.27
  4. Step 4: Simplify right side
    13,703.92x = 110,711,342.47
  5. Step 5: Solve for x
    x = 110,711,342.47/13,703.92
  6. Step 6: Final answer
    x = 8,078.81

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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.