Home / 39,189.45-54,081.27-21,284.31

Finding the Fourth Proportional to 39,189.45, 54,081.27 and 21,284.31

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Solution

The fourth proportional to 39,189.45, 54,081.27 and 21,284.31 is: 29,372.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,189.45 : 54,081.27 = 21,284.31 : x
  2. Step 2: Convert to fraction form
    39,189.45/54,081.27 = 21,284.31/x
  3. Step 3: Cross multiply
    39,189.45x = 54,081.27 × 21,284.31
  4. Step 4: Simplify right side
    39,189.45x = 1,151,082,515.87
  5. Step 5: Solve for x
    x = 1,151,082,515.87/39,189.45
  6. Step 6: Final answer
    x = 29,372.25

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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.