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Finding the Fourth Proportional to 14,610.40, 21,915.60 and 5,375.20

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Solution

The fourth proportional to 14,610.40, 21,915.60 and 5,375.20 is: 8,062.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,610.40 : 21,915.60 = 5,375.20 : x
  2. Step 2: Convert to fraction form
    14,610.40/21,915.60 = 5,375.20/x
  3. Step 3: Cross multiply
    14,610.40x = 21,915.60 × 5,375.20
  4. Step 4: Simplify right side
    14,610.40x = 117,800,733.12
  5. Step 5: Solve for x
    x = 117,800,733.12/14,610.40
  6. Step 6: Final answer
    x = 8,062.80

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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.