Home / 39,720.69-54,814.68-21,816.03

Finding the Fourth Proportional to 39,720.69, 54,814.68 and 21,816.03

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Solution

The fourth proportional to 39,720.69, 54,814.68 and 21,816.03 is: 30,106.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,720.69 : 54,814.68 = 21,816.03 : x
  2. Step 2: Convert to fraction form
    39,720.69/54,814.68 = 21,816.03/x
  3. Step 3: Cross multiply
    39,720.69x = 54,814.68 × 21,816.03
  4. Step 4: Simplify right side
    39,720.69x = 1,195,838,703.32
  5. Step 5: Solve for x
    x = 1,195,838,703.32/39,720.69
  6. Step 6: Final answer
    x = 30,106.19

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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.