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Finding the Fourth Proportional to 13,536.99, 20,305.49 and 8,918.91

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Solution

The fourth proportional to 13,536.99, 20,305.49 and 8,918.91 is: 13,378.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,536.99 : 20,305.49 = 8,918.91 : x
  2. Step 2: Convert to fraction form
    13,536.99/20,305.49 = 8,918.91/x
  3. Step 3: Cross multiply
    13,536.99x = 20,305.49 × 8,918.91
  4. Step 4: Simplify right side
    13,536.99x = 181,102,793.22
  5. Step 5: Solve for x
    x = 181,102,793.22/13,536.99
  6. Step 6: Final answer
    x = 13,378.37

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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.