Home / 39,720.26-54,814.04-21,816.42

Finding the Fourth Proportional to 39,720.26, 54,814.04 and 21,816.42

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Solution

The fourth proportional to 39,720.26, 54,814.04 and 21,816.42 is: 30,106.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.26 : 54,814.04 = 21,816.42 : x
  2. Step 2: Convert to fraction form
    39,720.26/54,814.04 = 21,816.42/x
  3. Step 3: Cross multiply
    39,720.26x = 54,814.04 × 21,816.42
  4. Step 4: Simplify right side
    39,720.26x = 1,195,846,009.45
  5. Step 5: Solve for x
    x = 1,195,846,009.45/39,720.26
  6. Step 6: Final answer
    x = 30,106.71

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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.