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Finding the Fourth Proportional to 18,916.30, 28,391.94 and 9,562.90

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Solution

The fourth proportional to 18,916.30, 28,391.94 and 9,562.90 is: 14,353.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.30 : 28,391.94 = 9,562.90 : x
  2. Step 2: Convert to fraction form
    18,916.30/28,391.94 = 9,562.90/x
  3. Step 3: Cross multiply
    18,916.30x = 28,391.94 × 9,562.90
  4. Step 4: Simplify right side
    18,916.30x = 271,509,283.03
  5. Step 5: Solve for x
    x = 271,509,283.03/18,916.30
  6. Step 6: Final answer
    x = 14,353.19

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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.