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Finding the Fourth Proportional to 39,305.58, 54,240.46 and 21,400.46

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Solution

The fourth proportional to 39,305.58, 54,240.46 and 21,400.46 is: 29,531.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,305.58 : 54,240.46 = 21,400.46 : x
  2. Step 2: Convert to fraction form
    39,305.58/54,240.46 = 21,400.46/x
  3. Step 3: Cross multiply
    39,305.58x = 54,240.46 × 21,400.46
  4. Step 4: Simplify right side
    39,305.58x = 1,160,770,794.61
  5. Step 5: Solve for x
    x = 1,160,770,794.61/39,305.58
  6. Step 6: Final answer
    x = 29,531.96

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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.