Home / 39,765.87-54,875.79-21,858.44

Finding the Fourth Proportional to 39,765.87, 54,875.79 and 21,858.44

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Solution

The fourth proportional to 39,765.87, 54,875.79 and 21,858.44 is: 30,164.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,765.87 : 54,875.79 = 21,858.44 : x
  2. Step 2: Convert to fraction form
    39,765.87/54,875.79 = 21,858.44/x
  3. Step 3: Cross multiply
    39,765.87x = 54,875.79 × 21,858.44
  4. Step 4: Simplify right side
    39,765.87x = 1,199,498,888.79
  5. Step 5: Solve for x
    x = 1,199,498,888.79/39,765.87
  6. Step 6: Final answer
    x = 30,164.03

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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.