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Finding the Fourth Proportional to 28,235.70, 38,982.15 and 17,639.69

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Solution

The fourth proportional to 28,235.70, 38,982.15 and 17,639.69 is: 24,353.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,235.70 : 38,982.15 = 17,639.69 : x
  2. Step 2: Convert to fraction form
    28,235.70/38,982.15 = 17,639.69/x
  3. Step 3: Cross multiply
    28,235.70x = 38,982.15 × 17,639.69
  4. Step 4: Simplify right side
    28,235.70x = 687,632,846.62
  5. Step 5: Solve for x
    x = 687,632,846.62/28,235.70
  6. Step 6: Final answer
    x = 24,353.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.