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Finding the Fourth Proportional to 28,915.60, 43,324.80 and 19,049.80

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Solution

The fourth proportional to 28,915.60, 43,324.80 and 19,049.80 is: 28,542.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,915.60 : 43,324.80 = 19,049.80 : x
  2. Step 2: Convert to fraction form
    28,915.60/43,324.80 = 19,049.80/x
  3. Step 3: Cross multiply
    28,915.60x = 43,324.80 × 19,049.80
  4. Step 4: Simplify right side
    28,915.60x = 825,328,775.04
  5. Step 5: Solve for x
    x = 825,328,775.04/28,915.60
  6. Step 6: Final answer
    x = 28,542.68

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1.5x scale

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.