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Finding the Fourth Proportional to 28,734.99, 39,649.99 and 16,157.31

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Solution

The fourth proportional to 28,734.99, 39,649.99 and 16,157.31 is: 22,294.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,734.99 : 39,649.99 = 16,157.31 : x
  2. Step 2: Convert to fraction form
    28,734.99/39,649.99 = 16,157.31/x
  3. Step 3: Cross multiply
    28,734.99x = 39,649.99 × 16,157.31
  4. Step 4: Simplify right side
    28,734.99x = 640,637,179.93
  5. Step 5: Solve for x
    x = 640,637,179.93/28,734.99
  6. Step 6: Final answer
    x = 22,294.67

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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.