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Finding the Fourth Proportional to 28,153, 42,229.50 and 10,618.73

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Solution

The fourth proportional to 28,153, 42,229.50 and 10,618.73 is: 15,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,153 : 42,229.50 = 10,618.73 : x
  2. Step 2: Convert to fraction form
    28,153/42,229.50 = 10,618.73/x
  3. Step 3: Cross multiply
    28,153x = 42,229.50 × 10,618.73
  4. Step 4: Simplify right side
    28,153x = 448,423,658.54
  5. Step 5: Solve for x
    x = 448,423,658.54/28,153
  6. Step 6: Final answer
    x = 15,928.10

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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.