Home / 21,291.42-29,382.39-11,860.50

Finding the Fourth Proportional to 21,291.42, 29,382.39 and 11,860.50

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Solution

The fourth proportional to 21,291.42, 29,382.39 and 11,860.50 is: 16,367.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.42 : 29,382.39 = 11,860.50 : x
  2. Step 2: Convert to fraction form
    21,291.42/29,382.39 = 11,860.50/x
  3. Step 3: Cross multiply
    21,291.42x = 29,382.39 × 11,860.50
  4. Step 4: Simplify right side
    21,291.42x = 348,489,836.60
  5. Step 5: Solve for x
    x = 348,489,836.60/21,291.42
  6. Step 6: Final answer
    x = 16,367.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.