Home / 20,764.80-31,155.60-8,461.44

Finding the Fourth Proportional to 20,764.80, 31,155.60 and 8,461.44

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Solution

The fourth proportional to 20,764.80, 31,155.60 and 8,461.44 is: 12,695.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.80 : 31,155.60 = 8,461.44 : x
  2. Step 2: Convert to fraction form
    20,764.80/31,155.60 = 8,461.44/x
  3. Step 3: Cross multiply
    20,764.80x = 31,155.60 × 8,461.44
  4. Step 4: Simplify right side
    20,764.80x = 263,621,240.06
  5. Step 5: Solve for x
    x = 263,621,240.06/20,764.80
  6. Step 6: Final answer
    x = 12,695.58

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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.