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Finding the Fourth Proportional to 18,915.86, 28,395.32 and 9,566.44

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Solution

The fourth proportional to 18,915.86, 28,395.32 and 9,566.44 is: 14,360.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,915.86 : 28,395.32 = 9,566.44 : x
  2. Step 2: Convert to fraction form
    18,915.86/28,395.32 = 9,566.44/x
  3. Step 3: Cross multiply
    18,915.86x = 28,395.32 × 9,566.44
  4. Step 4: Simplify right side
    18,915.86x = 271,641,983.08
  5. Step 5: Solve for x
    x = 271,641,983.08/18,915.86
  6. Step 6: Final answer
    x = 14,360.54

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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.