Home / 21,478.61-29,640.44-11,919.96

Finding the Fourth Proportional to 21,478.61, 29,640.44 and 11,919.96

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Solution

The fourth proportional to 21,478.61, 29,640.44 and 11,919.96 is: 16,449.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.61 : 29,640.44 = 11,919.96 : x
  2. Step 2: Convert to fraction form
    21,478.61/29,640.44 = 11,919.96/x
  3. Step 3: Cross multiply
    21,478.61x = 29,640.44 × 11,919.96
  4. Step 4: Simplify right side
    21,478.61x = 353,312,799.58
  5. Step 5: Solve for x
    x = 353,312,799.58/21,478.61
  6. Step 6: Final answer
    x = 16,449.52

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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.