Home / 20,932.39-28,869.99-13,769.66

Finding the Fourth Proportional to 20,932.39, 28,869.99 and 13,769.66

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Solution

The fourth proportional to 20,932.39, 28,869.99 and 13,769.66 is: 18,991.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.39 : 28,869.99 = 13,769.66 : x
  2. Step 2: Convert to fraction form
    20,932.39/28,869.99 = 13,769.66/x
  3. Step 3: Cross multiply
    20,932.39x = 28,869.99 × 13,769.66
  4. Step 4: Simplify right side
    20,932.39x = 397,529,967.04
  5. Step 5: Solve for x
    x = 397,529,967.04/20,932.39
  6. Step 6: Final answer
    x = 18,991.14

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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.