Home / 21,160.40-31,741.91-5,578.03

Finding the Fourth Proportional to 21,160.40, 31,741.91 and 5,578.03

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Solution

The fourth proportional to 21,160.40, 31,741.91 and 5,578.03 is: 8,367.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160.40 : 31,741.91 = 5,578.03 : x
  2. Step 2: Convert to fraction form
    21,160.40/31,741.91 = 5,578.03/x
  3. Step 3: Cross multiply
    21,160.40x = 31,741.91 × 5,578.03
  4. Step 4: Simplify right side
    21,160.40x = 177,057,139.64
  5. Step 5: Solve for x
    x = 177,057,139.64/21,160.40
  6. Step 6: Final answer
    x = 8,367.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.