Home / 12,642.48-18,965.84-3,875.28

Finding the Fourth Proportional to 12,642.48, 18,965.84 and 3,875.28

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Solution

The fourth proportional to 12,642.48, 18,965.84 and 3,875.28 is: 5,813.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.48 : 18,965.84 = 3,875.28 : x
  2. Step 2: Convert to fraction form
    12,642.48/18,965.84 = 3,875.28/x
  3. Step 3: Cross multiply
    12,642.48x = 18,965.84 × 3,875.28
  4. Step 4: Simplify right side
    12,642.48x = 73,497,940.44
  5. Step 5: Solve for x
    x = 73,497,940.44/12,642.48
  6. Step 6: Final answer
    x = 5,813.57

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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.