Home / 20,286.42-30,429.63-7,638.56

Finding the Fourth Proportional to 20,286.42, 30,429.63 and 7,638.56

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Solution

The fourth proportional to 20,286.42, 30,429.63 and 7,638.56 is: 11,457.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.42 : 30,429.63 = 7,638.56 : x
  2. Step 2: Convert to fraction form
    20,286.42/30,429.63 = 7,638.56/x
  3. Step 3: Cross multiply
    20,286.42x = 30,429.63 × 7,638.56
  4. Step 4: Simplify right side
    20,286.42x = 232,438,364.19
  5. Step 5: Solve for x
    x = 232,438,364.19/20,286.42
  6. Step 6: Final answer
    x = 11,457.83

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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.