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Finding the Fourth Proportional to 39,793.21, 54,913.48 and 21,888.21

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Solution

The fourth proportional to 39,793.21, 54,913.48 and 21,888.21 is: 30,205.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,793.21 : 54,913.48 = 21,888.21 : x
  2. Step 2: Convert to fraction form
    39,793.21/54,913.48 = 21,888.21/x
  3. Step 3: Cross multiply
    39,793.21x = 54,913.48 × 21,888.21
  4. Step 4: Simplify right side
    39,793.21x = 1,201,957,631.35
  5. Step 5: Solve for x
    x = 1,201,957,631.35/39,793.21
  6. Step 6: Final answer
    x = 30,205.10

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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.