Home / 39,579.92-54,620.36-21,430.84

Finding the Fourth Proportional to 39,579.92, 54,620.36 and 21,430.84

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Solution

The fourth proportional to 39,579.92, 54,620.36 and 21,430.84 is: 29,574.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,579.92 : 54,620.36 = 21,430.84 : x
  2. Step 2: Convert to fraction form
    39,579.92/54,620.36 = 21,430.84/x
  3. Step 3: Cross multiply
    39,579.92x = 54,620.36 × 21,430.84
  4. Step 4: Simplify right side
    39,579.92x = 1,170,560,195.90
  5. Step 5: Solve for x
    x = 1,170,560,195.90/39,579.92
  6. Step 6: Final answer
    x = 29,574.60

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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.