Home / 20,668.95-28,529.22-13,499.96

Finding the Fourth Proportional to 20,668.95, 28,529.22 and 13,499.96

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Solution

The fourth proportional to 20,668.95, 28,529.22 and 13,499.96 is: 18,633.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.95 : 28,529.22 = 13,499.96 : x
  2. Step 2: Convert to fraction form
    20,668.95/28,529.22 = 13,499.96/x
  3. Step 3: Cross multiply
    20,668.95x = 28,529.22 × 13,499.96
  4. Step 4: Simplify right side
    20,668.95x = 385,143,190.01
  5. Step 5: Solve for x
    x = 385,143,190.01/20,668.95
  6. Step 6: Final answer
    x = 18,633.91

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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.