Home / 12,826.62-19,221.48-5,420.90

Finding the Fourth Proportional to 12,826.62, 19,221.48 and 5,420.90

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Solution

The fourth proportional to 12,826.62, 19,221.48 and 5,420.90 is: 8,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,826.62 : 19,221.48 = 5,420.90 : x
  2. Step 2: Convert to fraction form
    12,826.62/19,221.48 = 5,420.90/x
  3. Step 3: Cross multiply
    12,826.62x = 19,221.48 × 5,420.90
  4. Step 4: Simplify right side
    12,826.62x = 104,197,768.99
  5. Step 5: Solve for x
    x = 104,197,768.99/12,826.62
  6. Step 6: Final answer
    x = 8,123.56

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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.