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Finding the Fourth Proportional to 39,390, 54,362.88 and 22,396.82

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Solution

The fourth proportional to 39,390, 54,362.88 and 22,396.82 is: 30,910.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390 : 54,362.88 = 22,396.82 : x
  2. Step 2: Convert to fraction form
    39,390/54,362.88 = 22,396.82/x
  3. Step 3: Cross multiply
    39,390x = 54,362.88 × 22,396.82
  4. Step 4: Simplify right side
    39,390x = 1,217,555,638.04
  5. Step 5: Solve for x
    x = 1,217,555,638.04/39,390
  6. Step 6: Final answer
    x = 30,910.27

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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.