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Finding the Fourth Proportional to 38,469.40, 53,009.02 and 28,381.92

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Solution

The fourth proportional to 38,469.40, 53,009.02 and 28,381.92 is: 39,108.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,469.40 : 53,009.02 = 28,381.92 : x
  2. Step 2: Convert to fraction form
    38,469.40/53,009.02 = 28,381.92/x
  3. Step 3: Cross multiply
    38,469.40x = 53,009.02 × 28,381.92
  4. Step 4: Simplify right side
    38,469.40x = 1,504,497,764.92
  5. Step 5: Solve for x
    x = 1,504,497,764.92/38,469.40
  6. Step 6: Final answer
    x = 39,108.95

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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.