Home / 39,720.88-54,814.78-21,817.02

Finding the Fourth Proportional to 39,720.88, 54,814.78 and 21,817.02

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Solution

The fourth proportional to 39,720.88, 54,814.78 and 21,817.02 is: 30,107.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.88 : 54,814.78 = 21,817.02 : x
  2. Step 2: Convert to fraction form
    39,720.88/54,814.78 = 21,817.02/x
  3. Step 3: Cross multiply
    39,720.88x = 54,814.78 × 21,817.02
  4. Step 4: Simplify right side
    39,720.88x = 1,195,895,151.56
  5. Step 5: Solve for x
    x = 1,195,895,151.56/39,720.88
  6. Step 6: Final answer
    x = 30,107.47

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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.