Home / 20,933.12-31,263.44-18,755.84

Finding the Fourth Proportional to 20,933.12, 31,263.44 and 18,755.84

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Solution

The fourth proportional to 20,933.12, 31,263.44 and 18,755.84 is: 28,011.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.12 : 31,263.44 = 18,755.84 : x
  2. Step 2: Convert to fraction form
    20,933.12/31,263.44 = 18,755.84/x
  3. Step 3: Cross multiply
    20,933.12x = 31,263.44 × 18,755.84
  4. Step 4: Simplify right side
    20,933.12x = 586,372,078.49
  5. Step 5: Solve for x
    x = 586,372,078.49/20,933.12
  6. Step 6: Final answer
    x = 28,011.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.