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Finding the Fourth Proportional to 27,999.80, 42,006.90 and 10,469.72

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Solution

The fourth proportional to 27,999.80, 42,006.90 and 10,469.72 is: 15,707.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.80 : 42,006.90 = 10,469.72 : x
  2. Step 2: Convert to fraction form
    27,999.80/42,006.90 = 10,469.72/x
  3. Step 3: Cross multiply
    27,999.80x = 42,006.90 × 10,469.72
  4. Step 4: Simplify right side
    27,999.80x = 439,800,481.07
  5. Step 5: Solve for x
    x = 439,800,481.07/27,999.80
  6. Step 6: Final answer
    x = 15,707.27

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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.