Home / 21,387.96-29,515.26-11,956.53

Finding the Fourth Proportional to 21,387.96, 29,515.26 and 11,956.53

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Solution

The fourth proportional to 21,387.96, 29,515.26 and 11,956.53 is: 16,499.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.96 : 29,515.26 = 11,956.53 : x
  2. Step 2: Convert to fraction form
    21,387.96/29,515.26 = 11,956.53/x
  3. Step 3: Cross multiply
    21,387.96x = 29,515.26 × 11,956.53
  4. Step 4: Simplify right side
    21,387.96x = 352,900,091.65
  5. Step 5: Solve for x
    x = 352,900,091.65/21,387.96
  6. Step 6: Final answer
    x = 16,499.94

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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.