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Finding the Fourth Proportional to 28,442.70, 42,665.13 and 10,914.30

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Solution

The fourth proportional to 28,442.70, 42,665.13 and 10,914.30 is: 16,371.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.70 : 42,665.13 = 10,914.30 : x
  2. Step 2: Convert to fraction form
    28,442.70/42,665.13 = 10,914.30/x
  3. Step 3: Cross multiply
    28,442.70x = 42,665.13 × 10,914.30
  4. Step 4: Simplify right side
    28,442.70x = 465,660,028.36
  5. Step 5: Solve for x
    x = 465,660,028.36/28,442.70
  6. Step 6: Final answer
    x = 16,371.86

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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.