Home / 39,680.07-54,759-21,774.68

Finding the Fourth Proportional to 39,680.07, 54,759 and 21,774.68

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Solution

The fourth proportional to 39,680.07, 54,759 and 21,774.68 is: 30,049.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,680.07 : 54,759 = 21,774.68 : x
  2. Step 2: Convert to fraction form
    39,680.07/54,759 = 21,774.68/x
  3. Step 3: Cross multiply
    39,680.07x = 54,759 × 21,774.68
  4. Step 4: Simplify right side
    39,680.07x = 1,192,359,428.33
  5. Step 5: Solve for x
    x = 1,192,359,428.33/39,680.07
  6. Step 6: Final answer
    x = 30,049.33

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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.