Home / 12,812.55-19,218.82-3,927.90

Finding the Fourth Proportional to 12,812.55, 19,218.82 and 3,927.90

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Solution

The fourth proportional to 12,812.55, 19,218.82 and 3,927.90 is: 5,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.55 : 19,218.82 = 3,927.90 : x
  2. Step 2: Convert to fraction form
    12,812.55/19,218.82 = 3,927.90/x
  3. Step 3: Cross multiply
    12,812.55x = 19,218.82 × 3,927.90
  4. Step 4: Simplify right side
    12,812.55x = 75,489,602.29
  5. Step 5: Solve for x
    x = 75,489,602.29/12,812.55
  6. Step 6: Final answer
    x = 5,891.85

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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.