Home / 20,318.42-28,039.28-11,365.88

Finding the Fourth Proportional to 20,318.42, 28,039.28 and 11,365.88

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Solution

The fourth proportional to 20,318.42, 28,039.28 and 11,365.88 is: 15,684.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.42 : 28,039.28 = 11,365.88 : x
  2. Step 2: Convert to fraction form
    20,318.42/28,039.28 = 11,365.88/x
  3. Step 3: Cross multiply
    20,318.42x = 28,039.28 × 11,365.88
  4. Step 4: Simplify right side
    20,318.42x = 318,691,091.77
  5. Step 5: Solve for x
    x = 318,691,091.77/20,318.42
  6. Step 6: Final answer
    x = 15,684.84

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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.