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Finding the Fourth Proportional to 28,287.41, 42,431.11 and 7,227.49

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Solution

The fourth proportional to 28,287.41, 42,431.11 and 7,227.49 is: 10,841.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,287.41 : 42,431.11 = 7,227.49 : x
  2. Step 2: Convert to fraction form
    28,287.41/42,431.11 = 7,227.49/x
  3. Step 3: Cross multiply
    28,287.41x = 42,431.11 × 7,227.49
  4. Step 4: Simplify right side
    28,287.41x = 306,670,423.21
  5. Step 5: Solve for x
    x = 306,670,423.21/28,287.41
  6. Step 6: Final answer
    x = 10,841.23

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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.