Home / 20,954-28,916.55-11,522.36

Finding the Fourth Proportional to 20,954, 28,916.55 and 11,522.36

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Solution

The fourth proportional to 20,954, 28,916.55 and 11,522.36 is: 15,900.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954 : 28,916.55 = 11,522.36 : x
  2. Step 2: Convert to fraction form
    20,954/28,916.55 = 11,522.36/x
  3. Step 3: Cross multiply
    20,954x = 28,916.55 × 11,522.36
  4. Step 4: Simplify right side
    20,954x = 333,186,899.06
  5. Step 5: Solve for x
    x = 333,186,899.06/20,954
  6. Step 6: Final answer
    x = 15,900.87

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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.