Home / 12,821.35-19,234.01-5,425.85

Finding the Fourth Proportional to 12,821.35, 19,234.01 and 5,425.85

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Solution

The fourth proportional to 12,821.35, 19,234.01 and 5,425.85 is: 8,139.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,821.35 : 19,234.01 = 5,425.85 : x
  2. Step 2: Convert to fraction form
    12,821.35/19,234.01 = 5,425.85/x
  3. Step 3: Cross multiply
    12,821.35x = 19,234.01 × 5,425.85
  4. Step 4: Simplify right side
    12,821.35x = 104,360,853.16
  5. Step 5: Solve for x
    x = 104,360,853.16/12,821.35
  6. Step 6: Final answer
    x = 8,139.62

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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.