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Finding the Fourth Proportional to 39,708.52, 54,797.81 and 21,804.68

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Solution

The fourth proportional to 39,708.52, 54,797.81 and 21,804.68 is: 30,090.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,708.52 : 54,797.81 = 21,804.68 : x
  2. Step 2: Convert to fraction form
    39,708.52/54,797.81 = 21,804.68/x
  3. Step 3: Cross multiply
    39,708.52x = 54,797.81 × 21,804.68
  4. Step 4: Simplify right side
    39,708.52x = 1,194,848,711.75
  5. Step 5: Solve for x
    x = 1,194,848,711.75/39,708.52
  6. Step 6: Final answer
    x = 30,090.49

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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.