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Finding the Fourth Proportional to 39,758.49, 54,866.85 and 21,855.33

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Solution

The fourth proportional to 39,758.49, 54,866.85 and 21,855.33 is: 30,160.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,758.49 : 54,866.85 = 21,855.33 : x
  2. Step 2: Convert to fraction form
    39,758.49/54,866.85 = 21,855.33/x
  3. Step 3: Cross multiply
    39,758.49x = 54,866.85 × 21,855.33
  4. Step 4: Simplify right side
    39,758.49x = 1,199,133,112.81
  5. Step 5: Solve for x
    x = 1,199,133,112.81/39,758.49
  6. Step 6: Final answer
    x = 30,160.43

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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.