Home / 20,658.56-30,911.26-12,343.12

Finding the Fourth Proportional to 20,658.56, 30,911.26 and 12,343.12

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Solution

The fourth proportional to 20,658.56, 30,911.26 and 12,343.12 is: 18,468.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.56 : 30,911.26 = 12,343.12 : x
  2. Step 2: Convert to fraction form
    20,658.56/30,911.26 = 12,343.12/x
  3. Step 3: Cross multiply
    20,658.56x = 30,911.26 × 12,343.12
  4. Step 4: Simplify right side
    20,658.56x = 381,541,391.53
  5. Step 5: Solve for x
    x = 381,541,391.53/20,658.56
  6. Step 6: Final answer
    x = 18,468.92

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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.