Home / 20,188-30,309.84-13,933.18

Finding the Fourth Proportional to 20,188, 30,309.84 and 13,933.18

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Solution

The fourth proportional to 20,188, 30,309.84 and 13,933.18 is: 20,918.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,188 : 30,309.84 = 13,933.18 : x
  2. Step 2: Convert to fraction form
    20,188/30,309.84 = 13,933.18/x
  3. Step 3: Cross multiply
    20,188x = 30,309.84 × 13,933.18
  4. Step 4: Simplify right side
    20,188x = 422,312,456.49
  5. Step 5: Solve for x
    x = 422,312,456.49/20,188
  6. Step 6: Final answer
    x = 20,918.98

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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.