Home / 12,982.86-19,505.50-8,311.95

Finding the Fourth Proportional to 12,982.86, 19,505.50 and 8,311.95

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Solution

The fourth proportional to 12,982.86, 19,505.50 and 8,311.95 is: 12,487.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982.86 : 19,505.50 = 8,311.95 : x
  2. Step 2: Convert to fraction form
    12,982.86/19,505.50 = 8,311.95/x
  3. Step 3: Cross multiply
    12,982.86x = 19,505.50 × 8,311.95
  4. Step 4: Simplify right side
    12,982.86x = 162,128,719.95
  5. Step 5: Solve for x
    x = 162,128,719.95/12,982.86
  6. Step 6: Final answer
    x = 12,487.90

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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.