Home / 21,160.59-29,190-13,489.62

Finding the Fourth Proportional to 21,160.59, 29,190 and 13,489.62

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Solution

The fourth proportional to 21,160.59, 29,190 and 13,489.62 is: 18,608.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.59 : 29,190 = 13,489.62 : x
  2. Step 2: Convert to fraction form
    21,160.59/29,190 = 13,489.62/x
  3. Step 3: Cross multiply
    21,160.59x = 29,190 × 13,489.62
  4. Step 4: Simplify right side
    21,160.59x = 393,762,007.80
  5. Step 5: Solve for x
    x = 393,762,007.80/21,160.59
  6. Step 6: Final answer
    x = 18,608.27

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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.