Home / 20,916.00-31,340.55-18,791.62

Finding the Fourth Proportional to 20,916.00, 31,340.55 and 18,791.62

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Solution

The fourth proportional to 20,916.00, 31,340.55 and 18,791.62 is: 28,157.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.00 : 31,340.55 = 18,791.62 : x
  2. Step 2: Convert to fraction form
    20,916.00/31,340.55 = 18,791.62/x
  3. Step 3: Cross multiply
    20,916.00x = 31,340.55 × 18,791.62
  4. Step 4: Simplify right side
    20,916.00x = 588,939,455.53
  5. Step 5: Solve for x
    x = 588,939,455.53/20,916.00
  6. Step 6: Final answer
    x = 28,157.37

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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.