Home / 39,390.21-54,358.66-21,485.60

Finding the Fourth Proportional to 39,390.21, 54,358.66 and 21,485.60

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Solution

The fourth proportional to 39,390.21, 54,358.66 and 21,485.60 is: 29,650.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,390.21 : 54,358.66 = 21,485.60 : x
  2. Step 2: Convert to fraction form
    39,390.21/54,358.66 = 21,485.60/x
  3. Step 3: Cross multiply
    39,390.21x = 54,358.66 × 21,485.60
  4. Step 4: Simplify right side
    39,390.21x = 1,167,928,425.30
  5. Step 5: Solve for x
    x = 1,167,928,425.30/39,390.21
  6. Step 6: Final answer
    x = 29,650.22

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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.