Home / 20,892.93-31,340.60-8,412.85

Finding the Fourth Proportional to 20,892.93, 31,340.60 and 8,412.85

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Solution

The fourth proportional to 20,892.93, 31,340.60 and 8,412.85 is: 12,619.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.93 : 31,340.60 = 8,412.85 : x
  2. Step 2: Convert to fraction form
    20,892.93/31,340.60 = 8,412.85/x
  3. Step 3: Cross multiply
    20,892.93x = 31,340.60 × 8,412.85
  4. Step 4: Simplify right side
    20,892.93x = 263,663,766.71
  5. Step 5: Solve for x
    x = 263,663,766.71/20,892.93
  6. Step 6: Final answer
    x = 12,619.76

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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.