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Finding the Fourth Proportional to 27,811, 38,379.18 and 15,235.48

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Solution

The fourth proportional to 27,811, 38,379.18 and 15,235.48 is: 21,024.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,811 : 38,379.18 = 15,235.48 : x
  2. Step 2: Convert to fraction form
    27,811/38,379.18 = 15,235.48/x
  3. Step 3: Cross multiply
    27,811x = 38,379.18 × 15,235.48
  4. Step 4: Simplify right side
    27,811x = 584,725,229.31
  5. Step 5: Solve for x
    x = 584,725,229.31/27,811
  6. Step 6: Final answer
    x = 21,024.96

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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.