Home / 13,176.40-19,764.60-12,811.90

Finding the Fourth Proportional to 13,176.40, 19,764.60 and 12,811.90

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Solution

The fourth proportional to 13,176.40, 19,764.60 and 12,811.90 is: 19,217.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,176.40 : 19,764.60 = 12,811.90 : x
  2. Step 2: Convert to fraction form
    13,176.40/19,764.60 = 12,811.90/x
  3. Step 3: Cross multiply
    13,176.40x = 19,764.60 × 12,811.90
  4. Step 4: Simplify right side
    13,176.40x = 253,222,078.74
  5. Step 5: Solve for x
    x = 253,222,078.74/13,176.40
  6. Step 6: Final answer
    x = 19,217.85

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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.