Home / 21,388.42-29,515.53-11,957.86

Finding the Fourth Proportional to 21,388.42, 29,515.53 and 11,957.86

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Solution

The fourth proportional to 21,388.42, 29,515.53 and 11,957.86 is: 16,501.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.42 : 29,515.53 = 11,957.86 : x
  2. Step 2: Convert to fraction form
    21,388.42/29,515.53 = 11,957.86/x
  3. Step 3: Cross multiply
    21,388.42x = 29,515.53 × 11,957.86
  4. Step 4: Simplify right side
    21,388.42x = 352,942,575.57
  5. Step 5: Solve for x
    x = 352,942,575.57/21,388.42
  6. Step 6: Final answer
    x = 16,501.57

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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.