Home / 12,811.82-19,218.72-4,918.12

Finding the Fourth Proportional to 12,811.82, 19,218.72 and 4,918.12

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Solution

The fourth proportional to 12,811.82, 19,218.72 and 4,918.12 is: 7,377.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.82 : 19,218.72 = 4,918.12 : x
  2. Step 2: Convert to fraction form
    12,811.82/19,218.72 = 4,918.12/x
  3. Step 3: Cross multiply
    12,811.82x = 19,218.72 × 4,918.12
  4. Step 4: Simplify right side
    12,811.82x = 94,519,875.11
  5. Step 5: Solve for x
    x = 94,519,875.11/12,811.82
  6. Step 6: Final answer
    x = 7,377.55

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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.